( ( Basal ( cell carcinoma ) ) ( ( is ( ( a cancer ) ( of ( ( the cells ) ( at ( ( the bottom ) ( of ( ( ( ( the ( skin 's ) ) ( outermost layer ) ) , ) ( the epidermis ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Basal) (NN cell) (NN carcinoma)) (VP (VBZ is) (NP (NP (DT a) (NN cancer)) (PP (IN of) (NP (NP (DT the) (NNS cells)) (PP (IN at) (NP (NP (DT the) (NN bottom)) (PP (IN of) (NP (NP (NP (DT the) (NN skin) (POS 's)) (JJ outermost) (NN layer)) (, ,) (NP (DT the) (NNS epidermis)))))))))) (. .)))
Basal cell carcinoma is a cancer of the cells at the bottom of the skin's outermost layer, the epidermis.
(ROOT (S (NP (NNS Melanocytes)) (VP (VBP are) (VP (VBN located) (PP (IN in) (NP (NP (DT the) (JJ bottom) (NN layer)) (PP (IN of) (NP (DT the) (NNS epidermis))))))) (. .)))