, at least he provides a strong itch to explore more . 
(ROOT (S (, ,) (ADVP (IN at) (JJS least)) (NP (PRP he)) (VP (VBZ provides) (NP (DT a) (JJ strong) (NN itch) (S (VP (TO to) (VP (VB explore) (NP (JJR more))))))) (. .)))
(ROOT (S (, ) (ADVP (IN ) (JJS )) (NP (PRP )) (VP (VBZ ) (NP (DT ) (JJ ) (NN ) (S (VP (TO ) (VP (VB ) (NP (JJR ))))))) (. )))