Table: wnba_expansion_draft
Columns: pick
player
nationality
new_wnba_team
former_wnba_team
college_country_team

Question: Name the number of former wnba team for 2
SQL: SELECT COUNT("former_wnba_team") FROM wnba_expansion_draft WHERE "pick" = 2

Question: Name the player for mercer
SQL: SELECT "player" FROM wnba_expansion_draft WHERE "college_country_team" = 'Mercer'