Subject	animal
Predicate	use duckweed cattails arrowheads pond fillies for
Object	shelter
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.0012
Neighborhood Sigma	0.0012
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source animals use algae duckweed cattails arrowheads pond fillies and eel grass for food and shelter 1 Answers.com Questions