title: List of fatal snake bites in the United States
context: The United States has about 20 species of venomous snakes, which include 16 species of rattlesnakes, two species of coral snakes, one species of cottonmouth (or water moccasin), and one species of copperhead. At least one species of venomous snake is found in every state except Alaska and Hawaii.[4]
question: How many species of venomous snakes live in North America?
answers: 20