Again, there were many, many things that happened at that school board meeting, and I can tell you that I was very much interested in what was being said. And so I pretty well made sure, at the beginning of that meeting, which went on for quite a long time, that I wouldn't miss anything, so I took care of my bathroom needs beforehand.
Person went to relieve them self because emergency 
The person relieved himself so they wouldn't miss anything. Not because it was an emergency.
( z1 go :ARG0 ( z2 person ) :purpose ( z3 relieve :ARG0 z2 :ARG1 z2 ) :ARG1-of ( z4 cause :ARG0 ( z5 emergency ) ) )