Complex sentence: Esporte Clube Pinheiros, or EC Pinheiros, is a Brazilian sports club based in São Paulo, Brazil, that amongst others, fields a men's professional basketball team which, for sponsorship reasons, is also known as Pinheiros/Sky.
Split into simpler sentences: Esporte Clube Pinheiros, or E.C. Pinheiros, is part of the Brazilian multi-sports club Esporte Clube Pinheiros, that is based in São Paulo, Brazil. The club amongst others, fields a men's professional basketball team which, for sponsorship reasons, is also known as Pinheiros/Sky.