Complex sentence: A grook ("gruk" in Danish) is a form of short aphoristic poem or rhyming aphorism, created by the Danish poet, designer, inventor and scientist Piet Hein, who wrote over 7000 of them, mostly in Danish or English.
Split into simpler sentences: A grook ("gruk" in Danish) is a form of short aphoristic poem. It was initially presented by the Danish poet and scientist Piet Hein, who wrote over 7000 of them, mostly in Danish or English.