human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Flat, Threaded, User-selectable themes, Calendar, Image attachment, Unread message tracking, WYSIWYG Editor
###Question: Which Image attachment has a Threaded of yes, and a Calendar of yes?
gpt
SELECT Image attachment FROM table WHERE Threaded = yes AND Calendar = yes