Complex sentence: After resigning from the AfD, Festerling joined Pegida and became the first-ever Pegida candidate to run for office, campaigning for the mayoral office of Dresden and receiving 9.6% of the vote in the election held on June 7,2015.
Split into simpler sentences: After resigning from the AfD, Festerling joined Pegida and became the first-ever Pegida candidate to run for office. She contested for the mayoral election in the city of Dresden and received 9.6% of the vote in the election held on June 7,2015.