In this task, you are given a set of context paragraph and some supporting facts to answer a question. Your task is to generate answer for given question based on set of context paragraphs and supporting facts.

Context_1 : Americhem, Inc. is a global masterbatch manufacturer that specializes in custom color and additive masterbatch solutions with its global headquarters in Cuyahoga Falls, Ohio. The company manufactures a diverse range of single pigment dispersions, color and additive concentrates and custom compounds. A sister company, Infinity LTL Engineered Compounds, manufactures custom compounded engineered thermoplastics, and has locations in Swedesboro, New Jersey and Morrisville, Pennsylvania. Vi-Chem, acquired in 2016, is a producer of PVC and elastomeric compounds. Context_2 : Lifes Rich Pageant is the fourth studio album by the American alternative rock band R.E.M., released in 1986. R.E.M. chose Don Gehman to produce the album, which was recorded at John Mellencamp's Belmont Mall Studios in Belmont, Indiana. This was the only album the band recorded with Gehman, who moved them from the more obscure and dense sound of their earlier albums to an accessible, pop rock-influenced quality. The album was well-received critically. Context_3 : "Cuyahoga" is a song by R.E.M. from their 1986 album "Lifes Rich Pageant". It was written primarily by R.E.M. bassist Mike Mills and drummer Bill Berry. It is one of R.E.M.'s earliest environmentally conscious songs, along with the album's lead single, "Fall on Me". fact_1 : "Cuyahoga" is a song by R.E.M. from their 1986 album "Lifes Rich Pageant". fact_2 : Lifes Rich Pageant is the fourth studio album by the American alternative rock band R.E.M., released in 1986. fact_3 : R.E.M. chose Don Gehman to produce the album, which was recorded at John Mellencamp's Belmont Mall Studios in Belmont, Indiana. Question: Who was the producer of "cuyahoga"?
Don Gehman