human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Call sign, Frequency, City of license, State, FCC info
###Question: What state is the radio station in that has a frequency of 90.1 FM and a city license in New Castle?
gpt
SELECT State FROM table WHERE Frequency = 90.1 fm AND City of license = new castle