"Mercury is *not* in fish" It is in fish - it is encapsulated in the scales.
(it; is encapsulated; L:in the scales) Context(it is encapsulated,List([43, 61))):(It; is; in fish) Context(It is it is encapsulated,List([27, 61))):(Mercury; is *not*; L:in fish)
it is encapsulated,List([43, 61)) It is it is encapsulated,List([27, 61))
it It Mercury
is encapsulated is is *not*
L:in the scales
in fish
L:in fish