Action to annul an arbitration award based on a dispute concerning a real property purchase and sale agreement containing an arbitration clause. Allegation that the award would be null and void on the grounds that the relationship is a consumer relationship and that the requirements of Article 4, §2, of the Brazilian Arbitration Act were not met. Inadmissibility, as the contract reflects a civil law relationship, given that it was entered into between private individuals, even though the sellers are civil engineers: