( ( The ( immune system ) ) ( ( is ( ( made up ) ( of ( ( ( white ( blood cells ) ) and ) ( ( other elements ) ( that ( ( work together ) ( to ( fight ( ( infection and ) disease ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ immune) (NN system)) (VP (VBZ is) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (NP (JJ white) (NN blood) (NNS cells)) (CC and) (NP (NP (JJ other) (NNS elements)) (SBAR (WHNP (WDT that)) (S (VP (VBP work) (ADVP (RB together)) (S (VP (TO to) (VP (VB fight) (NP (NN infection) (CC and) (NN disease))))))))))))) (. .)))
The immune system is made up of white blood cells and other elements that work together to fight infection and disease.
(ROOT (S (NP (DT A) (JJ healthy) (JJ immune) (NN system)) (VP (VBZ fights) (PRT (RP off)) (NP (NP (NNS infections)) (CC and) (NP (JJ other) (NNS dieases)))) (. .)))