Table: wnba_expansion_draft_3
Columns: pick
player
nationality
new_wnba_team
former_wnba_team
college_country_team

Question: When was Elaine Powell (g) of the United states picked?
SQL: SELECT "pick" FROM wnba_expansion_draft_3 WHERE "nationality" = 'united states' AND "player" = 'elaine powell (g)'