Original sentence: The 2015 European migrant crisis  arose through the rising number of asylum seekers and economic migrants, from areas such as the Middle East, Africa,  and the Balkans coming to the European Union across the Mediterranean Sea and Southeast Europe, and applying for asylum
Edited sentence: The 2015 European migrant crisis  arose through the rising number of refugees and economic migrants, from areas such as the Middle East, Africa,  and the Balkans coming to the European Union across the Mediterranean Sea and Southeast Europe, and applying for asylum