Smart Rats<br>When I was in high school I took biology. The classroom was in a lab, with rats and frogs, The rats ran on the wheel, which squeaked. The teach put a pencil in to stop the wheel from working. The room cheered when the rats pushed the pencil out and ran.
rats are used in biology to explore their body. 
( z1 use :ARG0 ( z2 biology ) :ARG1 ( z3 rat ) :ARG2 ( z4 explore :ARG0 z3 :ARG1 ( z5 body :poss z3 ) ) )