user: Question: Which Score has a Couple of Cristián & Cheryl, and a Style of Cha-cha-cha?
Columns: ['Couple', 'Score', 'Style', 'Music', 'Result']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Kristi & Mark', '30 (10, 10, 10)', 'Cha-cha-cha', '" Dancing on the Ceiling "— Lionel Richie', 'Winner']
SQL:

assistant: SELECT "Score" FROM "Table" WHERE "Couple" = 'Cristián & Cheryl' AND "Style" = 'Cha-cha-cha';