user: Question: How many people directed "The One with Rachel's Dream"?
Columns: ['No in series', 'No in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real']
Sample row: [195.0, 1.0, '"The One Where No One Proposes"', 'Kevin S. Bright', 'Sherry Bilsing-Graham & Ellen Plummer', 'September26,2002', 175251.0]
SQL:

assistant: SELECT COUNT("Directed by") FROM "Table" WHERE "Title" = '"The One with Rachel''s Dream"';