### Instruction: How many cycling world championships has Peter Sagan won?
### Input: Sagan is considered one of cycling's greatest talents, having earned many prestigious victories, including three consecutive World Championships, one European Championship, two Paris–Nice stages, seven Tirreno–Adriatico stages, one in the Tour de Romandie, three and the overall classification in the Tour de Pologne, a record seventeen stages and the overall in the Tour of California, and another fifteen in the Tour de Suisse.
### Response: Sagan has won three consecutive cycling world championships