1 Subjects: “...unmanned aerial vehicle (UAV)...”

2 Subjects: “...unmanned aerial vehicles (UAVs)...”

3 Subjects: “...unmanned aerial vehicles...”

4 Subjects: “...unmanned aerial vehicle...”

5 Subjects: “...unmanned aerial vehicle...”

6 Subjects: “...unmanned aerial vehicle...”

7 Subjects: “...unmanned aerial vehicle swarm...”

8 Subjects: “...unmanned aerial vehicle (UAV)...”

9 Subjects: “...unmanned aerial vehicle (UAV)...”

10 Subjects: “...unmanned aerial vehicles...”

11 Subjects: “...unmanned aerial vehicles (UAVs)...”

12 Subjects: “...unmanned aerial vehicles...”

13 Subjects: “...unmanned aerial vehicles (UAVs)...”

14 Subjects: “...unmanned aerial vehicle...”

15 Subjects: “...Unmanned Aerial Vehicles...”