Original sentence: In April 2006 , it was announced that the Fred C.Koch Foundation had contributed $1 million to help preserve the tallgrass prairies of the Tallgrass Prairie National Preserve in.Koch also supports Americans for Prosperity, formed as a successor to Citizens for a Sound Economy
Edited sentence: In April 2006, the Fred C.Koch Foundation announced it had contributed $1 million to help preserve the tallgrass prairies of the Tallgrass Prairie National Preserve in.Koch Industries also supports Americans for Prosperity, formed as a successor to Citizens for a Sound Economy.Koch Industries and its subsidiaries spent more than $20 million on lobbying in 2008, and $5.6 million in 2009, according to the Center for Responsive Politics, a nonpartisan research group