Assertion: sprinkler's part | /r/HasProperty | replaced
Facets:
value: periodically
type: TEMPORAL
Source sentences:
text: When parts need to be replaced, expect a 30%–100% charge on top of the part cost to cover labor costs.
text: Parts must be periodically replaced (plan on $100-$150 for a new timer, $25-$35 per zone for valves, $20-$25 for a valve box, $20-$30 per rotor head and $10-$15 per spray head, plus labor charges if hiring a professional.)