( ( ( the octahedron ) ( which ( has ( ( 8 ( equilateral triangles ) ) ( as faces ) ) ) ) ) ; )
(ROOT (NP (NP (NP (DT the) (NN octahedron)) (SBAR (WHNP (WDT which)) (S (VP (VBZ has) (NP (NP (CD 8) (JJ equilateral) (NNS triangles)) (PP (IN as) (NP (NNS faces)))))))) (: ;)))
the octahedron which has 8 equilateral triangles as faces;
(ROOT (S (NP (NP (DT The) (CD eight) (NNS sides)) (PP (IN of) (NP (DT an) (NN octahedra)))) (VP (VBP are) (PP (IN in) (NP (NP (DT the) (NN shape)) (PP (IN of) (NP (DT a) (NNS triangles)))))) (. .)))