(This is what you did in one of the early laboratory experiments--first beaker experiment.).
(This; is; what you did in one of the early laboratory experiments) Context(This is,List([1, 8))):(you; did; T:in one of the early laboratory experiments)
This is,List([1, 8))
This you
is did
what you did in one of the early laboratory experiments
T:in one of the early laboratory experiments