Complex sentence: In February 2011, after Cameron expressed a rejection of multiculturalism during a speech at the Munich Security Conference, Le Pen congratulated him again for what she claimed was an endorsement of the FN's views on the failure of multiculturalism and immigration.
Split into simpler sentences: In February 2011, David Cameron expressed a rejection of multiculturalism during a speech at Munich Security Conference. Afterwards, she congratulated him, for what she claimed was an endorsement of the FN's views on the failure of multiculturalism and immigration.