human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Condition, Prothrombin time, Partial thromboplastin time, Bleeding time, Platelet count
###Question: Which Prothrombin time has a Platelet count of unaffected, and a Bleeding time of unaffected, and a Partial thromboplastin time of normal or mildly prolonged?
gpt
SELECT Prothrombin time FROM table WHERE Platelet count = unaffected AND Bleeding time = unaffected AND Partial thromboplastin time = normal or mildly prolonged