In a story by CNN, the lead describes the who, what, where, and how of the story of a woman who fell and tore a work of art by Picasso at the Metropolitan Museum of Art in New York.
The who is a woman visiting the Metropolitan Museum of Art in Manhattan. The what is the Picasso painting known as "The Actor" being repaired, which is mentioned by name and also referenced as a Picasso painting, not just any painting. The how/why is because a woman fell on it and tore it. Lastly, the where is mentioned as the Metropolitan Museum of Art, with the dateline indicating the information was gathered in New York.
I must assume that the reason why the sentence begins with the mentioning that the painting is undergoing repair is to make the reader wonder how it got ripped so that one is motivated to read on past the first comma in the sentence. Since the article falls into the category of soft news, the author had more freedom of how to write the lead and likely chose to write it as he/she did in order to emphasize the fact that it was a significant piece of art work. This was done by mentioning that the work was by Picasso and naming it makes it sound like it is a more notable work of his rather than just any lesser painting of his.