The geography teacher drew the figures of Asia, Europe, America, Africa and Oceania, and coded each figure, and then asked five students to come up and recognize two continents  The students' answers were different  A: 3 is Europe and 2 is America; B: 4 is Asia and 2 is Oceania; C: 1 is Asia, 5 is Africa; D: 4 is Africa and 3 is Oceania; E: 2 is Europe and 5 is America
The geography teacher said, each of you is half right
3 is Europe, 4 is Africa