Subject isotope
Predicate be useful as
Object tracers
Modality
Modality Occurrences
some[subj/radioactive] 1
Polarity POSITIVE
Plausibility 0.0006
Neighborhood Sigma 0.0006
Local Sigma 0.0200
Example Sentences
Sentence Occurrences Source
radioactive isotopes are useful as tracers 1 Google Autocomplete