Table: football_season
Columns: date
round
opponent
venue
result
attendance

Question: What round did the celtic played away on 24 february 1900?
SQL: SELECT "round" FROM football_season WHERE "opponent" = 'celtic' AND "date" = '24 february 1900'

Question: Who played against in venue a on 17 february 1900?
SQL: SELECT "opponent" FROM football_season WHERE "venue" = 'a' AND "date" = '17 february 1900'

Question: How many people attended in the game against morton?
SQL: SELECT "attendance" FROM football_season WHERE "opponent" = 'morton'