Anchor: uh collect them and leave us new bags when ours get old and ratty or leave the ones if they're still in good shape
Entailed: Take the old ones and bring us new bags. 
Contradiction: Don't worry about collecting our bags.
Contradiction: Provision of adequate, qualified technical staff and suitable space and equipment to assure unreliable and innacurate data.
Contradiction: Pollution causes acid rain, but I'm not convinced of a link between water and air pollution.
Contradiction: The tent is inside the store.
Contradiction: The collected stalks are used for thatch or fuel at a later date.