Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Which crystal structures has a Tc(K) of 110 and the number of Cu-O planes in the unit cell is 3?

### Inputs:
table_name: table, columns: ['Formula', 'Notation', 'T c (K)', 'No. of Cu-O planes in unit cell', 'Crystal structure']

### Response:
SELECT Crystal structure FROM table WHERE No. of Cu-O planes in unit cell = 3 AND T c (K) = 110