Task: Evaluate and classify the sentence into an ordinal scale that captures the inferred mental state of the writer, considering the intensity of sentiments ranging from very positive to very negative. 2: very positive, 1: positive, 0: neutral, -1: negative, -2: very negative.
Sentence: dull , if not devoid of wit , this shaggy dog longs to frisk through the back alleys of history , but scarcely manages more than a modest , snoozy charm .
Intensity class: 