possess the lack-of-attention span 
(ROOT (S (VP (VB possess) (NP (DT the) (NML (NML (NN lack)) (HYPH -) (PP (IN of) (HYPH -) (NP (NN attention)))) (NN span)))))
(ROOT (S (VP (VB ) (NP (DT ) (NML (NML (NN )) (HYPH ) (PP (IN ) (HYPH ) (NP (NN )))) (NN )))))