1. A non-transitory computer-readable medium storing a program causing a computer to execute a process, the process comprising: acquiring from a microblog server a plurality of posted information items, each of the plurality of posted information items including at least either of a text information item and an image information item; generating text information items including a plurality of text items where the image information items are removed from the plurality of posted information items, and individually classifying the text items included in the text information items into first categories; generating image information items including a plurality of images where the text information items are removed from the plurality of posted information items, and individually classifying the images included in the image information items into second categories; associating the classified text items and the classified images with each other on the basis of the first and second categories to obtain results; and outputting the text items and the images, which have been associated with each other, for each of the results.