Task: Text to Code
Input (English): Step 1: For each row in Faculty_Participates_in table, find corresponding rows in Activity table and in Faculty table.
Step 2: find activity_name of the results of step 1 whose Lname equals Mark
Output (English): SELECT T1.activity_name FROM Activity AS T1 JOIN Faculty_Participates_in AS T2 ON T1.actid = T2.actid JOIN Faculty AS T3 ON T2.FacID = T3.FacID WHERE T3.Lname = "Mark"