the output unit outputs information indicating a temporal change in appearance frequency as information regarding the extracted person.

14. The data processing apparatus described in any one of 9 to 12,

in which the moving image data to be analyzed includes a plurality of pieces of child data captured at a plurality of places different from each other, and

the output unit outputs information indicating at least one of a place where the person has appeared and the number of places where the person has appeared as information regarding the extracted person.

15. The data processing apparatus described in any one of 2 to 14,

in which the person extraction unit executes processing for determining whether a person detected in a frame to be processed is similar to a person detected in a previously processed frame in an outer appearance feature value by a predetermined level or more, and

the data processing extraction unit further includes a unit that receives a user input to set the predetermined level in the processing.

16. The data processing apparatus described in 1, in which the extraction unit includes a word string extraction unit that analyzes text data to be analyzed and extracts a word string whose appearance frequency in the text data to be analyzed satisfies a predetermined condition among word strings detected in the text data to be analyzed, and

the output unit outputs information regarding the extracted word string.

17. A data processing method causing a computer to execute: