Demo of part of NLS in HTML|["block","MARKET",["none","Produce",["none","oranges","apples","carrots","bananas",["none","skinless"],"lettuce","beans"],"Cans",["none","apple sauce","bean soup","tomato soup"],"Cereals",["none","bread","noodles (elbow kind)","french bread"],"Cold Locker",["none","milk","butter"],"Frozen Locker","Miscellaneous",["none","paper towels"]],"SHOE STORE",["none","pick up shoes"],"HARDWARE",["none","charcoal","light bulbs, 100 watt","nails","broom","batteries","check tire sale"],"ART SUPPLY",["none","drawing paper"],"DRUG STORE",["none","film","protractor","scotch tape","newspaper","chapstick","aspirin"],"LIBRARY",["none","overdue -- 2 books","holding \"Mila 18\"","7th-grade refs, Indians"]]