When the fossil specimen reached the museum, scientists first cleaned, then prepared the fossil, and using mechanical extraction, removed the fossil from the rock matrix.
(the fossil specimen; reached; the museum) (scientists; using; mechanical extraction) (scientists; removed; the fossil; from the rock matrix) (scientists; cleaned then; T:When the fossil specimen reached the museum; T:first) Context(scientists cleaned then,List([45, 75))):(scientists; cleaned then prepared; the fossil; T:then)
scientists cleaned then,List([45, 75))
the fossil specimen scientists scientists scientists scientists
reached using removed cleaned then cleaned then prepared
the museum
mechanical extraction
the fossil from the rock matrix
T:When the fossil specimen reached the museum T:first
the fossil T:then