Assertion: lichen | /r/HasProperty | widespread
Facets:
value: because of their unusual partnership
type: CAUSE
Source sentences:
text: Lichens are widespread and may be long-lived; however, many are also vulnerable to environmental disturbance, and may be useful to scientists in assessing the effects of air pollution, ozone depletion, and metal contamination.
text: Lichens are so enormously successful and widespread because of their unusual partnership.
text: Lichens are widespread and may be long-lived, however, many are also vulnerable to environmental disturbance, and may be useful to scientists in assessing the effects of air pollution,ozone depletion, and metal contamination.