( ( Gas bubbles ) ( ( can ( ( ( ( float eggs ) out ) ( of ( the jars ) ) ) ( unless ( ( the spigots ) ( are screened ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Gas) (NNS bubbles)) (VP (MD can) (VP (VB float) (NP (NNS eggs)) (PRT (RP out)) (PP (IN of) (NP (DT the) (NNS jars))) (SBAR (IN unless) (S (NP (DT the) (NNS spigots)) (VP (VBP are) (ADJP (JJ screened))))))) (. .)))
Gas bubbles can float eggs out of the jars unless the spigots are screened.
(ROOT (S (NP (NNP Gas) (NN bubble) (NNS holes)) (VP (VBZ helps) (NP (NP (JJ pumice) (NN float)) (PP (IN in) (NP (NN water))))) (. .)))