( ( ( ( ( Squamous ( cell carcinoma ) ) , ) ( the ( second ( ( most common ) ( skin cancer ) ) ) ) ) , ) ( ( ( affects ( 100,000 Americans ) ) yearly ) . ) )
(ROOT (S (NP (NP (JJ Squamous) (NN cell) (NN carcinoma)) (, ,) (NP (DT the) (JJ second) (ADJP (RBS most) (JJ common)) (NN skin) (NN cancer)) (, ,)) (VP (VBZ affects) (NP (CD 100,000) (NNS Americans)) (ADVP (RB yearly))) (. .)))
Squamous cell carcinoma, the second most common skin cancer, affects 100,000 Americans yearly.
(ROOT (S (NP (JJ Squamous) (NN cell) (NN carcinoma)) (VP (VBZ is) (NP (DT the) (JJ second) (ADJP (RBS most) (JJ common)) (NN skin) (NN cancer))) (. .)))