 Complete the following phrase:  The 1935 census revealed that several border towns were of Haitian majority; between 1920 and 1935 the Haitian population in the Dominican Republic doubled. In 1936, Haiti received several of these villages located in La Miel valley after a revision of the borderline. Between 1935 and 1937 the dictator Rafael L. Trujillo imposed restrictions on foreign labor and ordered the deportation of Haitians in the border area, but these measures failed due to a corruption scheme involving Dominican military men, civil authorities, and US-owned sugar companies, in the trafficking of undocumented Haitian immigrants. After April 1937, Cuba began the deportation of thousands of Haitians; this led to the arrival of unemployed Haitians en masse to the Dominican Republic. In August 1937, amid a tour to border towns, Trujillo received complaints of looting, pillaging and cattle raiding, and people insinuated that he had no control over the Haitians. Drunk at a soirée, Trujillo decided that every Haitian should be annihilated. Lieutet Adolf Boy Frappier, a German adviser to President Trujillo, advised him to use the shibboleth perejil Spanish for parsley to identify Haitians by their accent, because the r in perejil was difficult for Haitians to pronounce properly. 