human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Call sign, Analog channel, Digital channel, Virtual channel, Network, Station Ownership
###Question: Call sign of k33ln-ld, and a Virtual channel of 33.5 is what network?
gpt
SELECT Network FROM table WHERE Call sign = k33ln-ld AND Virtual channel = 33.5