Take the following as truth: In the Baptism of Christ (1470) of Verrocchio, you can see the earliest identified work of his most famous pupil, Leonardo da Vinci the background landscape and the angel on the left, beautiful enough to reduce his companion angel to wide-eyed jealousy.
Then the following statement: "Verrocchio worked on a painting called the Baptism of Christ in 1470." is true, false, or inconclusive?