Why does Sentiment return different magnitude and score results from the online demo?

[southwest]

I have added the API for Sentiment to my project and when I run "Yes appointment confirmed" I get a magnitude and score of .1 but when I run it on the Google Natural Language API Demo I get a magnitude of 0.791 and a score of 0.754. Why are they so different?

Thank You

I am using this class in my code

public class Results

    {

        public string result { get; set; }

        public float magnitude { get; set; }

        public float score { get; set; }

    }