human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: School, Location, Mascot, Size, IHSAA Class, County, Year Joined, Previous Conference
###Question: What is the size of the team that was previously from Central Indiana conference, and is in IHSSA Class 4a?
gpt
SELECT Size FROM table WHERE IHSAA Class = 4a AND Previous Conference = central indiana