Table schema:
CREATE TABLE table_name_15 (date VARCHAR, year VARCHAR, location VARCHAR, result VARCHAR, competition VARCHAR)

Question: What is the date of the game with a loss result in the Europe/Africa Group I, Round Robin competition in Murcia (esp) after 1998?
SQL: SELECT date FROM table_name_15 WHERE result = "loss" AND competition = "europe/africa group i, round robin" AND location = "murcia (esp)" AND year > 1998