return string value for relative date based on slicer, not aggregate

Hi, Here is what I am looking for:

Table 1

TEAM NAME  TEAM ID

Team 1           1234

Team 2            4567

Table 2

EMPLOYEE NAME     END DATE              Team ID

John Smith 

Scott Mann               February 1, 2018    1234

Lisa Jackson              March 28, 2018       4567

Result I'm looking for:

Table

TEAM NAME      # EMPLOYEES

Team 1                1

Team 2                 2

Slicer->select Month & Year