Table: alberto_valerio_f3s
Columns: season
series
team_name
races
poles
wins
points
final_placing

Question: In the 2005 season, how many races did the 15th place team complete?
SQL: SELECT AVG("races") FROM alberto_valerio_f3s WHERE "final_placing" = '15th' AND "season" = '2005'

Question: Which team completed 10 races?
SQL: SELECT "team_name" FROM alberto_valerio_f3s WHERE "races" = 10