According to Komarica , 2,400 male residents of Srebrenica work in the Trepca mine and 1,900 work in a mine in Aleksandrovac .
<response> According to <person>Komarica</person> , 2,400 male residents of <location>Srebrenica</location> work in the <location>Trepca</location> mine and 1,900 work in a mine in <location>Aleksandrovac</location> . </response>