select 'https://dl.dropboxusercontent.com/u/13765392/img-responsive1.jpg' img_source
    , 'First image' img_alt
    , 'Title' caption_title
    , 'Subtext' caption_text
from dual

union

select 'https://dl.dropboxusercontent.com/u/13765392/img-responsive2.jpg' img_source
    , 'First image' img_alt
    , 'Title' caption_title
    , 'Subtext' caption_text
from dual

union

select apex_util.get_blob_file_src('P384_FILE', id) img_source
    , 'First image' img_alt
    , 'Title' caption_title
    , 'Subtext' caption_text
from some_table