Every year, about a quarter of all children sustain an injury serious enough to require medical attention, school absences, and/or bed rest.
More than a third of children sustain serious injuries each year.
We don't know how many children sustain serious injuries, but not serious enough to miss school or require medical attention (or how many children need medical attention but don't receive it).  Therefore we don't know whether or not this is true.
( z1 sustain :ARG0 ( z2 child :ARG1-of ( z3 include :ARG3 "1/3" :ARG2 ( z4 child ) ) :quant ( z5 more-than ) ) :ARG1 ( z6 injure :ARG1 z2 :ARG1-of ( z7 serious ) ) :frequency ( z8 rate-entity :ARG2 ( z9 temporal-quantity :quant 1 :unit ( z10 year ) ) ) )