More research is necessary to ascertain possible risks. However, it remains difficult for a patient to ascertain whether an online pharmacy is legitimate. Also, one must ascertain whether other substances were also ingested. We cannot precisely ascertain the time when tithes were first introduced into this country. This definition leads to numerous issues that can be difficult to ascertain. Sex, ancestry, and age should be determined before attempting to ascertain height, if possible. Interestingly, sometimes one can ascertain whether a Prairie Falcon is exactly in its second year. Resort must be had elsewhere to ascertain that. However, the committee could not ascertain their identities. The study proposed further research to ascertain if hybridization had occurred. The geographic range of chytridiomycosis is difficult to ascertain. The ethnicity of the people of Mitanni is difficult to ascertain. The earliest application of camouflage in warfare is impossible to ascertain. First, one must ascertain the facts. They reconcile after arresting several drug dealers as they try to ascertain Larkin's whereabouts.