1. A method, comprising: receiving a new video from one or more sensors; generating a new content graph (CG) based on the new video; comparing the new CG with a plurality of prior CGs, wherein the plurality of prior CGs are generated from a plurality of previously received videos; identifying a first portion of the new CG matching a portion of a first prior CG among the plurality of prior CGs and a second portion of the new CG matching a portion of a second prior CG among the plurality of prior CGs; analyzing a first set of semantic annotations (SAs) associated with the portion of the first prior CG and a second set of SAs associated with the portion of the second prior CG; and generating a sequence of SAs for the new video based on the analysis of the first and the second set of SAs.