vegetable contains removes & if something contains something else then that something is a source of that something else ->  fruit is a source of seeds  fruit is a source of seeds & vegetable is a whole of a specific -> fruit is a part of a tree that is a source of seeds fruit is a part of a tree that is a source of seeds  fruit is a part of a tree that is a source of seeds & an elm is a mean of specific -> fruit is a part of an oak that is a source of seeds fruit is a part of an oak that is a source of seeds  vegetable is a whole of an elm that is a sink of gathering & if something comes from something else then that something else is a source of that something -> fruit is a part of an oak where seeds come from