Task: Text to Code
Input (English): Step 1: For each row in mountain table, find the corresponding rows in photos table.
Step 2: find the number of different color in the results of step 1 whose Country equals Ethiopia
Output (English): SELECT Count ( DISTINCT T2.color ) FROM mountain AS T1 JOIN photos AS T2 ON T1.id = T2.mountain_id WHERE T1.Country = "Ethiopia"