Definition:
A study is a project with the goal to methodologically investigate something.
Editor note:
The construct 'has funding source' some ('has role' some funder) is necessary, because has funding source has the range has role some funder. This range comes from issue https://github.com/OpenEnergyPlatform/ontology/issues/850 : funding source is some kind of independent continuant, i.e. a organisation or person, that does something special (giving money). So it is anything that has role some funder.