Analyze the valence intensity of the tweeter's mood conveyed in the tweet "@VileBairn Turning then, the older woman looked at Sybil with a most somber expression. \n\n“She ran away from me. But I cannot blame her.”". Offer a real-valued score ranging from 0 to 1, where 1 indicates the most positive and 0 indicates the most negative sentiment.
0.383