How to write a haiku poem<br>Go for a walk in nature. Many haikus are inspired by objects in the natural world, such as trees, rocks, mountains, and flowers. To get ideas for your poem, take a walk in a park nearby or go for a hike in the woods.
A manmade object can inspire a Haiku poem 
It stated that many of the haiku poem are inspired by nature (natural)  but it didn't say all therefore some haiku may be inspired by a manmade object.
( z1 possible :ARG1 ( z2 inspire :ARG0 ( z3 object :ARG1-of ( z4 make :ARG0 ( z5 man ) ) ) :ARG2 ( z6 poem :mod ( z7 string-entity :value "Haiku" ) ) ) )