11. The information processing device according to claim 2 , wherein the one or more processors are configured to: perform dimension reduction to reduce a dimension of the image feature amount and the text feature amount; and learn the annotation model by using the multi-stream, including the image feature amount and the text feature amount after the dimension reduction, as the annotation sequence.
12. The information processing device according to claim 11 , wherein the one or more processors are configured to: obtain basis space data of a basis space for an image which has a dimension lower than a dimension of the image feature amount for mapping the image feature amount; perform the dimension reduction of the image feature amount based on the basis space data of the basis space; obtain basis space data of a basis space for text of which dimension is lower than a dimension of the text feature amount for mapping the text feature amount; and perform the dimension reduction of the text feature amount based on the basis space data of the basis space for text.