Complex sentence: In 1910, Muñoz Rivera ran for Resident Commissioner in the United States House of Representatives representing the Unionist Party of Puerto Rico, and served from 1911 to 1916.
Split into simpler sentences: In 1910, Muñoz Rivera ran a campaign for the possition of Resident Commissioner in the United States House of Representatives. He won representing the Unionist Party of Puerto Rico, serving from 1911 to 1916.