Complex sentence: Referring to "A Study in Scarlet", they locate the red string with the letter R. Rearranging the letters refers to the god Saturn referencing Saturday and connecting the riddle's locations on a map forms a tennis racquet referencing the Wimbledon championships.
Split into simpler sentences: Referring to "A Study in Scarlet", they locate a red string with the letter R. Rearranging the letters they found results in the god Saturn which is a reference to Saturday. Connecting the riddle's locations on a map forms a tennis racquet referencing the Wimbledon championships.