user: ### NOW ANSWER:
Question: Which crystal structures has a Tc(K) of 110 and the number of Cu-O planes in the unit cell is 3?
Columns: ['Formula', 'Notation', 'T c (K)', 'No. of Cu-O planes in unit cell', 'Crystal structure']
Types: ['text', 'text', 'real', 'real', 'text']
Sample row: ['YBa 2 Cu 3 O 7', '123', 92.0, 2.0, 'Orthorhombic']
SQL:

assistant: SELECT "Crystal structure" FROM "Table" WHERE "No. of Cu-O planes in unit cell" = 3.0 AND "T c (K)" = 110.0;