Run marathon has a precondition of get in shape. Get in shape has a precondition of exercise. Go for walk has final subevent go home. Pharmaceutical industry does not have a precondition of be in water. Kill someone has a precondition of be in water. Go for walk has a precondition of decide to go for walk. Exercise has a precondition of go for walk. Take break has a precondition of go for walk. Run marathon does not have a precondition of be marry. Run in marathon has a precondition of get in shape. Pharmaceutical industry has a precondition of decide to go for walk. Exercise does not have a precondition of be marry. Run marathon does not have a precondition of learn about nutrition.
Go for walk does not have a precondition of decide to go for walk.