Subject	source
Predicate	help
Object	historians
Modality	Modality Occurrences some[subj/primary] 1 some[subj/secondary] 1
Polarity	POSITIVE
Plausibility	0.8200
Neighborhood Sigma	0.8515
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source sources help historians 2 Google Autocomplete primary sources help historians 1 Google Autocomplete secondary sources help historians 1 Google Autocomplete sources help historians to understand the past 1 Answers.com Questions