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: An enthralling , playful film that constantly frustrates our desire to know the ` truth ' about this man , while deconstructing the very format of the biography in a manner that Derrida would doubtless give his blessing to .
Intensity score: 