Write a function that takes an incidence matrix representation of a graph, which may not be simple, and returns the incidence matrix representation of the corresponding simple graph which is obtained by removing loops and extra parallel edges from it. Example: Input matrix: 1 0 0 0 1 10 1 1 0 000 0 0 1 00 1 0 1 0 0 0 0 0 0 10100 0 0 0 10011 0 1 0 1 000 10 00000 0 0 1 0 1 1 0 1 0 0 0 0 0 Output matrix: 00 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 1 1 0 0 1 0 0 0 0 0 0 0 0 1 1 01 10100 100010