user: Question: Who was ranked in the same position in 1990-1991 as Andy Roberts in 1993-1994? 
Columns: ['Position', '1990–1991', '1991–1992', '1992–1993', '1993–1994', '1994–1995']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Mike Ray', 'Drew Kachtik', 'Cliff Swain', 'Cliff Swain', 'Cliff Swain']
SQL:

assistant: SELECT "1990–1991" FROM "Table" WHERE "1993–1994" = 'Andy Roberts';