human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Mountain, Height (m), Prominence (m), Range, Country
###Question: Which Country has a Prominence (m) smaller than 1540, and a Height (m) smaller than 3530, and a Range of virunga mountains, and a Mountain of nyiragongo?
gpt
SELECT Country FROM table WHERE Prominence (m) < 1540 AND Height (m) < 3530 AND Range = virunga mountains AND Mountain = nyiragongo