Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE patient ( name VARCHAR, SSN VARCHAR )
TABLE: CREATE TABLE undergoes ( patient VARCHAR, Stay VARCHAR )
TABLE: CREATE TABLE stay ( StayID VARCHAR, room VARCHAR )

### Question ###
Find the names of all patients who have an undergoing treatment and are staying in room 111.

### Accurate SQL ###

SELECT DISTINCT T2.name FROM undergoes AS T1 JOIN patient AS T2 ON T1.patient = T2.SSN JOIN stay AS T3 ON T1.Stay = T3.StayID WHERE T3.room = 111