Assertion: alluvial fan's area | /r/HasProperty | taken into account
Facets:
value: over a period
type: TEMPORAL
Source sentences:
text: Numerous areas like Waterman Canyon in San Bernardino or Cable Wash in Devore or Lytle Creek, all have similar riparian tree establishment puzzles which have clear explanations for their presence if time, observation and experience are taken into account over a period a couple decades.