Assertion: head louse | /r/HasProperty | common
Facets:
value: on children
type: LOCATION
value: among school-age children
type: OTHER
value: very
type: DEGREE
value: in the united states
type: LOCATION
Source sentences:
text: Head lice are common on children.
text: They are common human parasites.
text: Unlike body lice, head lice are not a primary health hazard, a sign of poor hygiene or a vector for disease , but they are a common societal problem  and relatively expensive to treat.
text: Head lice are common among young children.
text: In the United States, head lice are common among preschool children attending child care centers, elementary school age children, and household members of children with head lice.
text: In particular, know that head lice are very common, especially among school-age children.
text: In particular, know that head lice are very common, especially among school-age children.