Original sentence: mongst the first German settlers in Puerto Rico were Johann Kifenhover, who in 1832 established a school in San Juan, Adolfo Rauschenplatt, who founded a sugar cane export business
Edited sentence: Amongst the first German settlers in Puerto Rico were Johann Kifenhover, who in 1832 established a school in San Juan and Adolfo Rauschenplatt, who founded a sugar cane export business