CREATE TABLE "critical_temperature_t_c_crystal_structu" (
  "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?
SQL: SELECT "crystal_structure" FROM "critical_temperature_t_c_crystal_structu" WHERE "no_of_cu_o_planes_in_unit_cell"=3 AND "t_c_k"=110;