Instructions: Classify the relation of question with context to one of these categories: 1) award received, 2) based on, collection, 3) conflict, 4) constellation, 5) convicted of, 6) date of death, 7) director, 8) drafted by, 9) educated at, 10) medical condition, 11) military branch, 12) narrative location, 13) occupation, 14) original network, 15) parent company, 16) point in time, 17) production company, 18) residence, 19) series, 20) service entry, 21) sex or gender, 22) spouse, 23) standards body question.
Input: Context : The Portrait of Lorenzo di Credi is a painting by the Italian Renaissance artist Perugino, dating to around 1504 and housed in the National Gallery of Art, Washington, DC, United States. 
Question : What is the name of the place where Portrait of Lorenzo di Credi can be found?
Output:
collection