Complex sentence: Straight Pride (or Heterosexual Pride) is an anti-gay slogan that arose in the late 1980s and early 1990s and has been used primarily by social conservative groups as a political stance and slogan adopted by various LGBT groups in the early 1970s.
Split into simpler sentences: Straight Pride (or Heterosexual Pride) is an anti-gay slogan that arose in the late 1980s and early 1990s and has been used primarily by social conservative groups as a political stance and slogan. The term is described as a response to the "Gay pride" manifestation adopted by various LGBT groups in the early 1970s.