Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_31936 ( "Formula" text, "Notation" text, "T c (K)" real, "No. of Cu-O planes in unit cell" real, "Crystal structure" text )

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

### Accurate SQL ###

SELECT "Crystal structure" FROM table_31936 WHERE "No. of Cu-O planes in unit cell" = '3' AND "T c (K)" = '110'