Question: 
Write a python function to get the first element of each sublist.


Model's Code:
def Extract(lst):
    return [sublist[0] for sublist in lst]



Sample Correct Code:
def Extract(lst): 
    return [item[0] for item in lst] 


Asserts:
assert Extract([[1, 2], [3, 4, 5], [6, 7, 8, 9]]) == [1, 3, 6]
assert Extract([[1,2,3],[4, 5]]) == [1,4]
assert Extract([[9,8,1],[1,2]]) == [9,1]


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 460 of 974: 337/460 (73.26086956521739%): success