Assertion: lignin's number | /r/AtLocation | service
Facets:
Source sentences:
text: Many of these lasted into the 1970s with a small number remaining in service into the first decade of the 2000s (most of these came down when the overhead 600 V DC feeders were replaced with a new system of underground feeders, the rest coming out of service as aging crossarms supporting the remaining overhead feeders were replaced).