Task: Determine the valence intensity of the sentence, indicating a degree of positivity or negativity on a scale from 0 (strongly negative) to 1 (strongly positive), reflecting the emotional content expressed.
Sentence: A dreary , incoherent , self-indulgent mess of a movie in which a bunch of pompous windbags drone on inanely for two hours  a cacophony of pretentious , meaningless prattle .
Intensity score: 