CREATE TABLE Parts (part_id VARCHAR, part_name VARCHAR)
CREATE TABLE Part_Faults (part_id VARCHAR, part_fault_id VARCHAR)
CREATE TABLE Skills_Required_To_Fix (part_fault_id VARCHAR)

Which part fault requires the most number of skills to fix? List part id and name.
SELECT T1.part_id, T1.part_name FROM Parts AS T1 JOIN Part_Faults AS T2 ON T1.part_id = T2.part_id JOIN Skills_Required_To_Fix AS T3 ON T2.part_fault_id = T3.part_fault_id GROUP BY T1.part_id ORDER BY COUNT(*) DESC LIMIT 1
SELECT "T1"."part_id", "T1"."part_name" FROM "Parts" AS "T1" JOIN "Part_Faults" AS "T2" ON "T1"."part_id" = "T2"."part_id" JOIN "Skills_Required_To_Fix" AS "T3" ON "T2"."part_fault_id" = "T3"."part_fault_id" GROUP BY "T1"."part_id" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1