Abstract: Systems and methods are provided for query responding. An exemplary method implementable by one or more computing devices may comprise: receiving a query, wherein the query includes a first sequence of words; converting the query into a second sequence of words by using a first machine learning model; and obtaining a result for the query by applying a second machine learning model to a combination of the first sequence of words and the second sequence of words.

Abstract: Systems and methods are provided for searching historical data. An exemplary method implementable by a computing device, may comprise: obtaining, from a computing device, an audio input; determining a query associated with the audio input based at least on the audio input, wherein the query comprises one or more entities each associated with one or more contents; determining whether the query is related to a historical activity based at lease on the one or more entities each associated with the one or more contents; and in response to determining that the query is related to a historical activity, searching historical data based on the query associated with the audio input.