"Child labor" is, generally speaking, work for children that harms them or exploits them in some way (physically, mentally, morally, or by blocking access to education).
Children can't be forced into child labor
( z1 possible :polarity - :ARG1 ( z2 force :ARG1 ( z3 child ) :ARG2 ( z4 labor :ARG0 z3 :ARG1 z3 ) ) )