Complex sentence: In 2005, Viotti assumed the post of Chargé d'affaires of Brazil to the United Nations, and she was appointed Permanent Representative of Brazil to the United Nations by President Luiz Inácio Lula da Silva on 5 January 2007.
Split into simpler sentences: In 2005, she assumed the post of Chargé d'affaires of Brazil to the United Nations. Viotti was appointed Permanent Representative of Brazil to the United Nations by President Luiz Inácio Lula da Silva on 5 January 2007.