Complex sentence: It was proposed by William Thurston in the late 1970s, and implies several other conjectures, such as the Poincaré conjecture and Thurston's elliptization conjecture.
Split into simpler sentences: It was proposed by William Thurston in the late 1970s. It implies other conjectures, such as the Poincaré conjecture and Thurston's elliptization conjecture.