Abstract: The subject matter of this document can be embodied in, among other things, a computer-method that includes receiving a text message associated with a first telephone number, and establishing a communication session associated with the received text message. The communication session is established by modifying the received text message so that the received text message is associated with a second telephone number that is different from the first telephone number, and subsequent text messages associated with the second telephone number are included as part of the communication session. The method also includes transmitting the text message to a text messaging system, such that the text message appears to have originated from the second telephone number. Upon receiving a text message reply from a user in response to the transmitted text message, the text message reply is associated with the established communication session.

Abstract: Methods, systems, and apparatus, including computer program products for identifying original content. In one aspect a method is described that includes deriving a plurality of content pieces from a collection of documents, each content piece occurring in one or more documents in the collection of documents. Each document in the collection of documents is associated with a time and an author. A first document in the collection of documents is identified, the identified first document being the earliest document containing an occurrence of a first piece of content. A first author associated with the first document is ranked based on a number of documents that contain at least one occurrence of the content piece and that are associated with an author other than the first author.

Abstract: A system identifies a set of documents from a corpus of documents that are relevant to a word, phrase or sentence and that were published at approximately a same time period, where each document of the set of documents includes news content and has an associated headline. The system extracts headlines from the set of documents and derives a score for each headline of the extracted headlines based on how many times selected words in each headline occurs among all of the extracted headlines.

Abstract: The subject matter of this document can be embodied in, among other things, a computer-method that includes receiving a text message associated with a first telephone number, and establishing a communication session associated with the received text message. The communication session is established by modifying the received text message so that the received text message is associated with a second telephone number that is different from the first telephone number, and subsequent text messages associated with the second telephone number are included as part of the communication session. The method also includes transmitting the text message to a text messaging system, such that the text message appears to have originated from the second telephone number. Upon receiving a text message reply from a user in response to the transmitted text message, the text message reply is associated with the established communication session.

Abstract: The subject matter of this document can be embodied in, among other things, a computer-method that includes receiving a text message associated with a first telephone number, and establishing a communication session associated with the received text message. The communication session is established by modifying the received text message so that the received text message is associated with a second telephone number that is different from the first telephone number, and subsequent text messages associated with the second telephone number are included as part of the communication session. The method also includes transmitting the text message to a text messaging system, such that the text message appears to have originated from the second telephone number. Upon receiving a text message reply from a user in response to the transmitted text message, the text message reply is associated with the established communication session.

Abstract: A system identifies a set of documents from a corpus of documents that are relevant to a word, phrase or sentence and that were published at approximately a same time period, where each document of the set of documents includes news content and has an associated headline. The system extracts headlines from the set of documents and derives a score for each headline of the extracted headlines based on how many times selected words in each headline occurs among all of the extracted headlines.