With more than 500 slides entries received and the exhibition space limited to its two Water Tower galleries, selection for inclusion was very competitive.
(more than 500 slides entries; received; ) (the exhibition space; limited; to its two Water Tower galleries) (the exhibition space limited to its two Water Tower galleries, selection for inclusion; was; very competitive)
more than 500 slides entries the exhibition space the exhibition space limited to its two Water Tower galleries, selection for inclusion
received limited was
to its two Water Tower galleries
very competitive