Numbers began wafting about on the  I'd say at least five
( Numbers ( began ( ( wafting ( about ( on ( the I ) ) ) ) ( 'd ( say ( ( at least ) five ) ) ) ) ) )
(ROOT (S (NP (NNS Numbers)) (VP (VBD began) (SBAR (S (NP (NP (VBG wafting)) (PP (IN about) (PP (IN on) (NP (DT the) (NN I))))) (VP (MD 'd) (VP (VB say) (NP (QP (IN at) (JJS least) (CD five))))))))))
There were less than five of them.
( There ( ( were ( ( less ( than five ) ) ( of them ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD were) (NP (NP (QP (JJR less) (IN than) (CD five))) (PP (IN of) (NP (PRP them))))) (. .)))