The pencap<br>I needed a to write a song. I had nothing to write with. I looked in my desk for a pen. I only saw a pen cap. I threw the pen cap away.
The author needed to write a musical piece. 
( z1 need :ARG0 ( z2 author ) :ARG1 ( z3 write :ARG0 z2 :ARG1 ( z4 piece :mod ( z5 music ) ) ) )