user: Question: In which round was Barbara Hawcroft the loser?
Columns: ['Year', 'Grand Slam', 'Round', 'Winner', 'Loser']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1969.0, 'Australian Open', 'First round', 'Margaret Court', 'Judith Gohn']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Loser" = 'Barbara Hawcroft';