Evidence first submitted on appeal and not offered at the trial level is not considered by the BIA unless it is considered as part of a motion to remand. See Matter of Soriano, 19 I&N Dec. 764 (BIA 1988); Matter of Arias, 19 I&N Dec. 568 (BIA 1988); Matter of Obaigbena, 19 I&N Dec. 533 (BIA 1988); Matter of Estime, 19 I&N Dec. 450 (BIA 1987).