( ( Dissolve ( ( ( the yeast ) ( in ( ( 1/4 cup ) ( of ( the ( lukewarm water ) ) ) ) ) ) ( ( ( add sugar ) and ) ( ( set aside ) ( until ( ( the mixture ) ( ( rises and ) foams ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Dissolve) (S (NP (NP (DT the) (NN yeast)) (PP (IN in) (NP (NP (CD 1/4) (NN cup)) (PP (IN of) (NP (DT the) (JJ lukewarm) (NN water)))))) (VP (VP (VB add) (NP (NN sugar))) (CC and) (VP (VB set) (PRT (RP aside)) (SBAR (IN until) (S (NP (DT the) (NN mixture)) (VP (VP (VBZ rises)) (CC and) (VP (VBZ foams))))))))) (. .)))
Dissolve the yeast in 1/4 cup of the lukewarm water add sugar and set aside until the mixture rises and foams.
(ROOT (S (NP (NP (NNP Sugar) (NNS crystals)) (VP (VBG dissolving) (PP (IN in) (NP (NN water))))) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (NP (DT the) (NN formation)) (PP (IN of) (NP (DT a) (NN mixture))))))) (. .)))