Data: 1036 Ganymed, discoverer, Walter Baade; Walter Baade, doctoralStudent, Halton Arp

1036 Ganymed was discovered by Walter Baade, whose doctoral student was Halton Arp.

Data: Aaron S. Daggett, battle, American Civil War; American Civil War, commander, Abraham Lincoln

Aaron S. Daggett fought in the American Civil War in which Abraham Lincoln was a commander.

Data: United States, leader, John Roberts
John Roberts is the leader of the United States.