Frankfurt, also known as Frankfurt am Main, Germany, is significant to Sherlock Holmes (2009) because it is the birthplace of Hans Zimmer. He is the composer of the movie, and was born on September 12, 1957.
I found this information from a secondary source that serves as an encyclopedia with personal information and career accomplishments for Hans Zimmer specifically.
This source is an example of collective authorship with low barriers to entry because it is written by both Laura Payne and Britannica Editors, and was very accessible for finding additional and useful information about Hans Zimmer.
Mapping this location on COVE adds a grassroots layer by providing a biography type style of the composer, Zimmer, and the accomplishments and awards in which he has received. This is important to note for his role in Sherlock Holmes as the person in charge of scoring and creating the best mood for the film.
Image: https://www.pinterest.com/pin/frankfurt-schumann-theater-1957--3659243426693338/