Question: Finland won the first Eurovision Dance Contest in 2007, in 2008, Finland were represented by singer and actress Maria Lund, and dancer Mikko Ahti, danced a Tango,a Tango is a partner dance, that originated in the 1880s, along which location, the natural border between Argentina and Uruguay?
Sentence (from "Tango"): Tango is a partner dance that originated in the 1880s along the River Plata, the natural border between Argentina and Uruguay, and soon spread to the rest of the world.
Relevant evidence: Yes