Mountain Climbing<br>Tim went on a camping trip with friends. They decided to climb up a mountain. It started to snow out of nowhere. Tim and his friends kept going. It made the scenery that much more beautiful.
the snow started falling when they were climbing the mountain
( z1 start :ARG1 ( z2 fall :ARG1 ( z3 snow ) ) :time ( z4 climb :ARG0 ( z5 they ) :ARG1 ( z6 mountain ) ) )