Table schema:
CREATE TABLE table_name_1 (partial_thromboplastin_time VARCHAR, condition VARCHAR, prothrombin_time VARCHAR, bleeding_time VARCHAR)

Question: Which Partial thromboplastin time has a Prothrombin time of prolonged, and a Bleeding time of unaffected, and a Condition of vitamin k deficiency or warfarin? Question 6
SQL: SELECT partial_thromboplastin_time FROM table_name_1 WHERE prothrombin_time = "prolonged" AND bleeding_time = "unaffected" AND condition = "vitamin k deficiency or warfarin"