it progresses in such a low-key manner that it risks monotony 
(ROOT (S (NP (PRP it)) (VP (VBZ progresses) (PP (IN in) (NP (PDT such) (DT a) (ADJP (JJ low) (HYPH -) (JJ key)) (NN manner))) (SBAR (WDT that) (S (NP (PRP it)) (VP (VBZ risks) (NP (NN monotony))))))))
(ROOT (S (NP (PRP )) (VP (VBZ ) (PP (IN ) (NP (PDT ) (DT ) (ADJP (JJ ) (HYPH ) (JJ )) (NN ))) (SBAR (WDT ) (S (NP (PRP )) (VP (VBZ ) (NP (NN ))))))))