1. A voice conversation support apparatus for supporting a user to have a conversation, comprising: an input unit configured to accept a text data input according to a voice input mode and another input mode, wherein the voice input mode converts a voice uttered by the user into text data, wherein another input mode accepts an input operation from the user; a first determination unit configured to extract at least one subject keyword representing a current subject from the text data input; a second determination unit configured to extract a question pair of a question sentence and an answer sentence by determining whether the text data input is at least one of a question sentence and an answer sentence, and estimate a category of a word that can be an answer based on a format of the question sentence and the subject keyword, as a temporary answer category, when the text data input is the question sentence; a third determination unit configured to estimate a category of a answered content based on the answer sentence, and calculate a question pair likelihood based on at least one of the temporary answer category and the answer category, when the question pair is obtained; a scoring unit configured to calculate a score about a priority of each input mode based on the temporary answer category and the question pair likelihood; and a screen generation unit configured to display the input modes in an order of the scores calculated by the scoring unit.
1. A voice conversation support apparatus for supporting a user to have a conversation, comprising: an input unit configured to accept a text data input according to a voice input mode and another input mode, wherein the voice input mode converts a voice uttered by the user into text data, wherein another input mode accepts an input operation from the user; a first determination unit configured to extract at least one subject keyword representing a current subject from the text data input; a second determination unit configured to extract a question pair of a question sentence and an answer sentence by determining whether the text data input is at least one of a question sentence and an answer sentence, and estimate a category of a word that can be an answer based on a format of the question sentence and the subject keyword, as a temporary answer category, when the text data input is the question sentence; a third determination unit configured to estimate a category of a answered content based on the answer sentence, and calculate a question pair likelihood based on at least one of the temporary answer category and the answer category, when the question pair is obtained; a scoring unit configured to calculate a score about a priority of each input mode based on the temporary answer category and the question pair likelihood; and a screen generation unit configured to display the input modes in an order of the scores calculated by the scoring unit. 6. The apparatus according to claim 1 , further comprising an option generation unit configured to generate an option as an answer candidate based on the temporary answer category, when the second determination unit determines that the text data input is the question sentence, wherein the scoring unit calculates the score about the priority of each input mode based on the generated option in addition to the temporary answer category and the question pair likelihood.