Answer:
Data/Report collected
Step-by-step explanation:
The mayor wants to know the number of cases of disorder over tha past year, if he does needs information about it, there must have been a research carried out to know the number of cases and the ones that were solved. In thus case, there must have been some data collected to present to the mayor. The best possible set of people that will form the team of data scientist that will collect such information from hospitals must include an epidemiologist. So therefore, the mayor will actually request for such data From the epidemiologist because he is must have been part of the team.
The best answer to the blank of the question is "DATA or REPORT".