Question: Which county that has Santiago Daniel Martinez Roa as a player is sometimes referred to as "Corazón de Sudamérica"?
Sentence (from "Santiago Daniel Martinez Roa"): Santiago Daniel Martinez Roa (born 16 August 1995 in Limpio) is an Paraguayn football player who plays for Vllaznia Shkodër in the Albanian Superliga as a Midfielder.
Relevant evidence: Yes