Complex sentence: MIT rivalry is a college rivalry between the California Institute of Technology (Caltech) and the Massachusetts Institute of Technology (MIT), stemming from the schools' reputations as top science and engineering schools in the United States.
Split into simpler sentences: MIT rivalry is a college rivalry between the California Institute of Technology (Caltech) and the Massachusetts Institute of Technology (MIT). The rivalry stems from the schools' reputations as top science and engineering schools in the United States.