Complex sentence: He returned in August during the G1 Climax in two special tag matches with A.J. Styles as his opponent with Shinsuke Nakamura and Masahiro Chono as Angle's partners and Hiroshi Tanahashi and Shinjiro Otani as Styles' partners.
Split into simpler sentences: He returned in August during the G1 Climax in two special tag matches with A.J. Styles as his main opponent. In those matches Shinsuke Nakamura and Masahiro Chono became Angle's partners while Hiroshi Tanahashi and Shinjiro Otani became Styles' partners.