Question: 
Write a function to extract every specified element from a given two dimensional list.


Model's Code:
def specified_element(matrix, index):
    return [row[index] for row in matrix]



Sample Correct Code:
def specified_element(nums, N):
    result = [i[N] for i in nums]
    return result


Asserts:
assert specified_element([[1, 2, 3, 2], [4, 5, 6, 2], [7, 1, 9, 5]],0)==[1, 4, 7]
assert specified_element([[1, 2, 3, 2], [4, 5, 6, 2], [7, 1, 9, 5]],2)==[3, 6, 9]
assert specified_element([[1, 2, 3, 2], [4, 5, 6, 2], [7, 1, 9, 5]],3)==[2,2,5]


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

Test 154 of 974: 112/154 (72.72727272727273%): success