Tired<br>I was working very late. I wanted to go home. I had to finish my work though. I was extremely tired. I drank a cup of coffee to help me stay awake.
The only reason to drink coffee is to stay awake.
There are many reasons to drink coffee.
( z1 have-purpose :ARG1 ( z2 drink :ARG1 ( z3 coffee ) ) :ARG2 ( z4 stay :ARG1 ( z5 awake ) ) :mod ( z6 only ) )