Determine the valence intensity of the writer's mental state conveyed in the sentence "The Introduction does not relate thematically to any of the main sections of the movement—in fact, it is the third movement that draws its thematic material from this section—but the harmonic and motivic principles at play here foreshadow some important elements of the entire piece.". Provide a score from 0 to 1, where 1 signifies very positive and 0 signifies very negative.