Question: How many studio albums have been released by an American crossover thrash band from Los Angeles, California, formed in 1984 under the name The Brood, and influenced by an English heavy metal band formed in Leyton, East London, in 1975 by bassist and primary songwriter Steve Harris?
Sentence (from "Iron Maiden"): Iron Maiden are an English heavy metal band formed in Leyton, East London, in 1975 by bassist and primary songwriter Steve Harris.
Relevant evidence: Yes