Assertion: mescaline's use | /r/HasProperty | concentrated in region
Facets:
Source sentences:
text: In ancient times their use was concentrated in the regions to which they are native.
text: In ancient times their use was concentrated in the regions to which they are native.
text: In ancient times their use was concentrated in the regions to which they are native.
text: In ancient times their use was concentrated in the regions to which they are native.