 Complete the following phrase:  By 2013, an estimated 500 persons of predomitly African immigrant and Romani origin were residing in the Terras do Lelo Terras da Costa shantytown in Lisbon, with no access to sewerage, clean drinking water, or legal electricity. In 2008, the slum residents had been scheduled for relocation to new homes with better living conditions, however plans were put on hold as a result of the 