0 classroom 1 student chair 2 counter 3 student desk 4 student desk group 5 chair with pad 6 student desk area 7 door 8 blackboard 9 box 10 closet 11 storage area 12 instructor area 13 onwall cabinet 14 student area 15 sink 16 table 17 window group 18 window 19 shelves 20 human 21 book array 22 trash bin 23 laptop 24 speaker 25 slogan 26 projecter screen 27 meter box 28 cabinet 29 projector 30 rug 31 desktop 32 computer machine 33 wall lamp 34 monitor 35 flag 36 platform 37 table lamp 38 ceiling lamp 39 curtain 40 clock 41 student desk-meaningless 42 onwall cabinet-meaningless 43 door-meaningless 44 closet-meaningless 45 counter-meaningless 46 sink-meaningless 47 chair with pad-meaningless 48 blackboard-meaningless 49 box-meaningless 50 student chair-meaningless 51 table-meaningless 52 window-meaningless 53 shelves-meaningless 54 human-meaningless 55 rug-meaningless 56 projector-meaningless 57 cabinet-meaningless 58 monitor-meaningless 59 wall lamp-meaningless 60 ceiling lamp-meaningless 61 curtain-meaningless 62 clock-meaningless 63 trash bin-meaningless 64 teacher chair 65 teacher chair-meaningless 66 teacher desk 67 teacher desk-meaningless 68 teacher desk group 69 teacher desk area 70 meaningless 71 front area 72 back area 73 room 74 plant 75 telephone 76 printer 77 vacuum 78 object-on-wall