sentences: running is a kind of movement & an animal requires energy to move ->  an animal requires energy to run  an animal requires energy to run & to require something means to need something ->  an animal needs energy to run  food is a source of energy for animals / plants & one can get something from a source ->  animals get energy from food  an animal needs energy to run & animals get energy from food ->  an animal gets the energy it needs to run from food  an animal gets the energy it needs to run from food & a dog is a kind of animal -> a dog gets the energy it needs to run from food