source: In 1984, he graduated Medical School with a Doctor of Medicine degree, but his deteriorating eyesight forced him to abandon his dreams of becoming an astronaut.
target: In 1984, he graduated Medical School with a Doctor of Medicine degree. But his deteriorating eyesight forced him to abandon his dreams. He dreamed of becoming an astronaut.
references: In 1984, he graduated Medical School with a Doctor of Medicine degree. But his deteriorating eyesight forced him to abandon his dreams. He dreamed of becoming an astronaut.