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.
rat are smart animals. 
( z1 animal :ARG1-of ( z2 smart ) :domain ( z3 rat ) )