This demonstrates how to use d3-annotation() with d3.forceSimulation to draw a Venn Diagram. In this the Venn shows a population of data visualizers (a semi-mythical and apparently controversial profession) that describe their organization as having data visualization professionals either embedded in other teams (green) or in a dedicated data visualization team (tan) or having both (green and tan). This uses d3.packEnclose to determine the size and location of the annotation subject, which utilizes d3.annotationCalloutCircle.
d3-annotation by Susie Lu.