human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Date, Type, Record description, Achievement, Pilot
###Question: Pilot of g.v. alfyorov, and a Record description of altitude with kg (lb) payload, and a Type of mi-10 involved what date?
gpt
SELECT Date FROM table WHERE Pilot = g.v. alfyorov AND Record description = altitude with kg (lb) payload AND Type = mi-10