suffocate the illumination created by the two daughters 
(ROOT (S (VP (VB suffocate) (NP (NP (DT the) (NN illumination)) (VP (VBN created) (PP (IN by) (NP (DT the) (CD two) (NNS daughters))))))))
(ROOT (S (VP (VB ) (NP (NP (DT ) (NN )) (VP (VBN ) (PP (IN ) (NP (DT ) (CD ) (NNS ))))))))