A girl with blue nail polish, is in a workshop or garage among a variety of tools and objects and is pouring a clear liquid from a large, clear pitcher into a green, two-liter soda bottle.
A girl is pouring a liquid.
Knowing the basis on which the case instances were selected, for example, is crucial in cumulation; otherwise it is not possible to know whether best case, worst case, typical, or the like instances are being aggregated.