Assertion: biological tissue valve | /r/HasProperty | replaced
Facets:
Source sentences:
text: Biological tissue valves degenerate over time and may eventually need to be replaced.
text: Biological tissue valves degenerate over time, and often eventually need to be replaced.
text: Biological tissue valves break down over time, and often eventually need to be replaced.
text: Biological tissue valves degenerate over time, and often eventually need to be replaced.