"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).
"Child labor" first began in the 1800s.
( z1 begin :ARG1 ( z2 labor :ARG0 ( z3 child ) ) :ord ( z4 ordinal-entity :value 1 ) :time ( z5 date-entity :century 1800 ) )