premise: Political and economic upheaval in countries like Iraq and Yemen has caused increasing numbers of Arab Muslims to move into the area over the last few years, experts say.
hypothesis: A fewer predators is most likely to cause the number of rabbits living in an area to increase.
hypothesis_graph_structure: A fewer predators<>is<>most likely to cause the number of rabbits$$$A fewer predators<>to cause<>the number of rabbits$$$rabbits<>living<>in an area<>to increase$$$the number of rabbits<>to increase<>