In advancing the concept of salsa as a musical "sauce", containing many different ingredients from various cultures mixed together, some point to the occasional use of non-Cuban forms in salsa, such as the Puerto Rican bomba. The percentage of salsa compositions based in non-Cuban genres is low though, and despite an openness to experimentation and a willingness to absorb non-Cuban influences, - such as Jazz and of Rock and Roll, with regards to formal structure, and many other informal influences from talented musicians of a broad range of musical and ethnic backgrounds; such as Puerto Ricans, Dominicans, Italians and Jews: anyone with talent and the will to experiment - salsa has remained consistently wedded to its Cuban templates. It was common practice for salsa bands to resurrect pre-salsa Cuban classics. For example, several of Arsenio Rodriguez's son montunos from the 1940s, such as "Fuego en el 23" (recorded by Sonora Ponceña) and "El divorcio" (recorded by Johnny Pacheco) were modernized by salsa arrangers. The pan-Latin Americanism of salsa is found in its cultural milieu, more than its musical structure. Today, competing nationalities claim ownership of the music, as there are musicians in New York City, Puerto Rico, Colombia, and Venezuela, who claim salsa was invented in their country.