Question: What is the nickname of the talisman who was part of the year that AIK only conceded 28 goals?
Sentence (from "2007 AIK Fotboll season"): Argentine recruits Iván Obolo and Lucas Valdemarín impressed upon their arrivals, forming an impressive unit with Figueiredo, which was curtailed when Al-Rayyan bought Figueiredo in September.
Relevant evidence: No