. "refugee" . "major migration movements from 2015" . . "reasons" . . "recent migration movements" . . "large numbers of refugees" . "Refugee_crisis#Causes" . "refugee crises" . "Refugee crisis" . "the refugee crisis" . "2015 refugee crisis" . . . "refugee crisis" . . "global refugee crisis" . . . . . . . "massive influx" . . . "crisis" . "displacement crises" . . . . . . . "16100000" . . . "Refugee_crisis" . . "21300000" . . . "Refugee crisis" . "causes supporting refugees" . . .