Sentence:  A mixture of Mountain Dew and racing fuel, called "<WSD>dewshine</WSD>," could be to blame for the deaths of two Greenbrier teenagers, whose cases are among the first reported in Tennessee, according to health officials. 
Meaning of the word marked with <WSD> tags:  An often lethal drink, a mixture of (Mountain Dew) and racing fuel that is almost 100% methanol.