A scientist then looks into the spinning mirror to observe the flash of light that returns from the second mirror.
(the flash of light; returns; from the second mirror) (A scientist; looks; into the spinning mirror; to observe the flash of light; T:then) Context(A scientist looks,List([0, 22))):(A scientist; looks into the spinning mirror to observe; the flash of light that returns from the second mirror)
A scientist looks,List([0, 22))
the flash of light A scientist A scientist
returns looks looks into the spinning mirror to observe
from the second mirror
into the spinning mirror to observe the flash of light T:then
the flash of light that returns from the second mirror