Question

More than 90 people came to the exhibition,many of ... children had pictures on the walls​

Answer 1

More than 90 people came to the exhibition, many of whose children had pictures on the walls​.

Более 90 человек пришли на выставку, многие детей которых имели картины на стенах.

Answer 2

More than 90 people came to the exhibition, many of whom were children with pictures on the walls.