Assertion: overpopulation | /r/HasProperty | leading cause
Facets:
value: to speak
type: MANNER
value: for the desire
type: PURPOSE
Source sentences:
text: Overpopulation in one's nation of origin is a leading cause for the desire to migrate; there exist many cities and rural areas that are overcrowded to an unhealthy degree.
text: Overpopulation is the planet's leading problem, the root of the evils, so to speak.