Table: nabc_player_of_year
Columns: season
player
junior_college
state
position
class
university

Question: in which class is the position forward
SQL: SELECT "class" FROM nabc_player_of_year WHERE "position" = 'Forward'

Question: in which season the position was center
SQL: SELECT "season" FROM nabc_player_of_year WHERE "position" = 'Center'

Question: in which class was the ohio state university
SQL: SELECT "class" FROM nabc_player_of_year WHERE "university" = 'Ohio State'