Complex sentence: In 1972 she became the first openly lesbian elected delegate to a major political convention-1972 Democratic National Convention, Miami, McGovern, and she addressed the convention on behalf of inclusion of a gay rights plank in the Democratic Platform.
Split into simpler sentences: In 1972 she was elected to the Democratic National Convention in Miami, and became the first openly lesbian elected delegate to a major political convention. She addressed the convention on behalf of inclusion of a gay rights plank in the Democratic Platform.