Final answer:
The information provided does not specify a poem about the Saint Francis Dam disaster. References to representations of Saint Francis in art are unrelated to the event in question.
Step-by-step explanation:
The poem about the Saint Francis Dam disaster isn't mentioned directly in the information provided. However, the Saint Francis Dam disaster refers to a historical event that took place in 1928 when the dam, located northeast of Los Angeles, failed and caused widespread destruction and loss of life. This tragic event has been the subject of various works, including literature, but without a specific poem or author mentioned, we cannot accurately attribute a poem to this event. It's important to note the provided information references various representations of Saint Francis of Assisi in art and has no connection to the dam disaster. For example, the references to Zurbarán's painting in the National Gallery and Giovanni Bellini's Saint Francis in the Desert offer insight into how artists have historically portrayed Saint Francis, not the dam disaster.