user: Question: What is the total number of lyricist where the lyrics theme is Romance and the song lasts 3:50?
Columns: ['Date', 'Album name', 'Track', 'Track title', 'Lyricist', 'Music genre/style', 'Major instrument(s)', 'Lyrics theme/style', 'Duration']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2000-11-07', 'Jay 周杰倫同名專輯', '1-01', 'Adorable Woman 可愛女人 (kě ài nǚ rén)', 'Vivian Hsu 徐若瑄', 'R&B', 'Guitar ( acoustic )', 'Romance', '3:59']
SQL:

assistant: SELECT COUNT("Lyricist") FROM "Table" WHERE "Lyrics theme/style" = 'Romance' AND "Duration" = '3:50';