These investigators showed that most of these fine particles form through combustion--such as smoking, cooking, burning candles or firewood.
(These investigators; showed; that most of these fine particles form through combustion--such as smoking, cooking, burning candles or firewood) Context(These investigators showed,List([0, 26))):(most of these fine particles; form; through combustion)
These investigators showed,List([0, 26))
These investigators most of these fine particles
showed form
that most of these fine particles form through combustion--such as smoking, cooking, burning candles or firewood
through combustion