Table: football_games_4
Columns: week
date
kickoff
opponent
final_score
team_record
game_site
attendance

Question: How many different kickoffs happened when the oppenent was at Rhein Fire?
SQL: SELECT COUNT("kickoff") FROM football_games_4 WHERE "opponent" = 'at Rhein Fire'

Question: How many different kickoffs happened when the opponent was the Scottish Claymores
SQL: SELECT COUNT("kickoff") FROM football_games_4 WHERE "opponent" = 'Scottish Claymores'