1. A computer program product for determining a relationship score between a first physical entity and a second physical entity, the computer program product comprising a computer readable storage medium having program code embodied therewith, the program code executable by a processor to: generate, by the processor, a first computer-readable representation of a first spatial region containing the first physical entity; generate, by the processor, a second computer-readable representation of a second spatial region containing the second physical entity; compare, by the processor, the first computer-readable representation and the second computer-readable representation at decreasing resolutions until a matching condition is reached; assign, by the processor, a relationship score to one or more of the first physical entity and the second physical entity based on the resolution at which the matching condition is reached; and determine and take into account a temporal proximity between the first entity and the second entity when assigning the relationship score, wherein the program code for determining and taking into account the temporal proximity includes program code executable by a processor to: generate a first computer-readable representation of a first time interval associated with the first entity; generate a second computer-readable representation of a second time interval associated with the second entity; compare the first computer-readable representation and the second computer-readable representation at decreasing resolutions until a temporal matching condition is reached; and assign a temporal relationship score to one or more of the first entity and the second entity based on the resolution at which the temporal matching condition is reached.