Complex sentence: Federico Pinedo (born 29 December 1955) is an Argentine politician, provisional president of the Argentine Senate and was Acting President of Argentina on 10 December 2015 until the assumption of Mauricio Macri in the same day.
Split into simpler sentences: Federico Pinedo (born 29 December 1955) is an Argentine politician, provisional president of the Argentine Senate. He was in charge of the executive branch on 10 December 2015 until the assumption of Mauricio Macri in the same day.