Complex sentence: The Bill Graham Civic Auditorium (formerly the Exposition Auditorium), the United Nations Charter was signed in the War Memorial Veterans Building's Herbst Theatre in 1945, leading to the creation of the United Nations.
Split into simpler sentences: The Bill Graham Civic Auditorium (formerly the Exposition Auditorium). The United Nations Charter was signed in the War Memorial Veterans Building's Herbst Theatre in 1945, leading to the creation of the United Nations.