Je was op zoek naar: collections (Engels - Swahili)

they managed to assemble the most complete collections of photos, videos and timelines.
hawa wawili walifaulu kukusanya kikamilifu kabisa picha, video na hata nyakati.

these actions have damaged many historical sites and museums, and important syrian cultural property has disappeared from the country to end up on the black market and/or in private collections.
matukio haya yameharibu maeneo mengi ya kihistoria na makumbusho, na utajiri mkubwa wa kiutamaduni nchini humo umetoweka nchini na kuishia kwenye minada haramu na/au kuhifadhiwa na watu binafsi.

example of a data collection application letter
mfano wa barua ya maombi ya kukusanya data