The students used stethoscopes and stopwatches, as they did in their science class, to make their measurements.
(The students; used; stethoscopes and stopwatches) (they; did; L:in their science class; to make their measurements) Context(they did,List([51, 59))):(they; did to make; their measurements)
they did,List([51, 59))
The students they they
used did did to make
stethoscopes and stopwatches
L:in their science class to make their measurements
their measurements