People on a nature walk with nets and backpacks with trees to the left of them.
People on a nature walk with no equipment and trees to the right of them.
The people cannot simultaneously walk with no equipment and with nets and backpacks
People are either carrying nets and backpacks or are carrying no equipment at all, can't be both.
The people have nets and backpacks and are near the trees to the left of them. They can't both have nets and backpacks and have no equipment and be at both the left and right of the trees.