For some experiments there will be a Pre-Laboratory Assigninent, which must be completed and turned in before a student may be allowed to perform an experiment.
(a Pre-Laboratory Assigninent; must be completed; ) (a Pre-Laboratory Assigninent; turned in; T:before a student may be allowed to perform an experiment) (a student; may be allowed; ) (a student; to perform; an experiment)
a Pre-Laboratory Assigninent a Pre-Laboratory Assigninent a student a student
must be completed turned in may be allowed to perform
T:before a student may be allowed to perform an experiment
an experiment