Assertion: thatch's lifespan | /r/HasProperty | long
Facets:
Source sentences:
text: Although a thatched roof can have a long lifespan, there can be slight maintenance required due to the factors listed about and the natural degradation of materials over time which is inevitable.
text: The thatched roof had to be fire retardant, require no maintenance, have a long lifespan and be aesthetically in-keeping with the look of an African thatched roof.