GRISALES: Thank you. Let's take a listen. Let's take a listen. All right. CLAUDIA GRISALES, BYLINE: Hi, Mary Louise.
The investigators turned on white noise.
( z0 turn-on :ARG0 ( z1 person :ARG0-of ( z2 investigate ) ) :ARG1 ( z3 noise :ARG1-of ( z4 white ) ) )
(z0 / turn-on-13
    :ARG0 (z1 / person
              :ARG0-of (z2 / investigate-01))
    :ARG1 (z3 / noise
              :ARG1-of (z4 / white-03)))
The investigators turned on white noise .
z1 :ARG0-of z2
z0 :ARG0 z1
z3 :ARG1-of z4
z0 :ARG1 z3