[tag=NNS] [lemma=who] [□] □
[tag=NNS] [lemma=who] [□=□] □
[tag=NNS] [lemma=who] [!□] □
The alleged drug dealers who operated these rogue Internet pharmacies received prescription orders for controlled substances over the Internet , which were then shipped to the doors of many U.S. citizens-sometimes without any prescription needed .