Question: The Chamizal dispute was caused by a shift in which one of the principal rivers in the southwest United States and northern Mexico?
Sentence (from "Chamizal dispute"): The Chamizal was once the only link between El Paso and Ciudad Juárez and tensions over the territory during the historic Taft–Diaz summit almost resulted in the attempted assassination of both presidents on October 16, 1909.
Relevant evidence: No