( ( ( Radioisotope or ) Radioactive ) ( ( Isotope ( ( A ( unstable isotope ) ) ( of ( ( an element ) ( that ( randomly ( emits ( ( ( ( one or ) more ) types ) ( of radioactivity ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Radioisotope) (CC or) (NNP Radioactive)) (VP (VBP Isotope) (NP (NP (DT A) (JJ unstable) (NN isotope)) (PP (IN of) (NP (NP (DT an) (NN element)) (SBAR (WHNP (WDT that)) (S (ADVP (RB randomly)) (VP (VBZ emits) (NP (NP (QP (CD one) (CC or) (JJR more)) (NNS types)) (PP (IN of) (NP (NN radioactivity))))))))))) (. .)))
Radioisotope or Radioactive Isotope A unstable isotope of an element that randomly emits one or more types of radioactivity .
(ROOT (S (NP (DT A) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NNS radioisotopes)) (VP (VBZ is) (NP (NP (DT an) (NN isotope)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (JJ radioactive))))))) (. .)))