Hello. You did not say which article this question refers to, which makes it impossible for me to answer your question accurately.
However, to help you, I will show you how to recognize an implicit thesis and the supporting details for it. Hope this helps.
An implicit thesis is something that the author of the article presented in the text, although not directly. In other words, the author of the article does not directly address a point in the subject to which the article refers, but presents statements that make the reader understand this implied thesis. This information is supporting statements.
An example of this can be seen in the text below:
"In his musical compositions, Bridges presented social criticisms that were establishing themselves in his time, but that nobody really perceived them, but they are criticisms that would fit very well in the time in which we are currently living."
With this text, the author does not talk about how Bridges and his music were innovative and ahead of their time, however he presents information that reinforces this idea.