blue and white tennis shoe
black elbow pad
white cone sitting on ground
boy in white shirt sitting down
white helmet
black helmet
boy in white shirt riding skateboard
boy in blue shirt riding skateboard
skateboard lying on ground
blue helmet lying on ground
two men in a skateboard race
a man wearing a white skateboard helmet
a man wearing a black skateboard helmet
the wheels of a skateboard
the wheels of a skateboard
the feet of a skateboarder
the feet of a skateboarder
the arm of a man
the head of a man
the head of a man
the boy on the skateboard
the boy on the skateboard
white cone on the ground
the white cone on the ground
the boy wearing white helmet
boy wearing black helmet
purple wheels on the skateboard
yellow wheels on the skateboard
boy wearing white shirt
boy wearing blue shirt
skateboarder wearing  white helmet
white protective helmet
black skateboard helmet
spectators watching skateboarding street competition slalom
white plastic slalom cone
steel utility pole
skate board helmets
skateboarder waiting to take his turn
skateboarders in dual slalom competition
skateboard leaning up against curve
Orange cone on street
White cone on street
Shoe on skateboard is green
Shoe on skateboard is green
Wheel on skateboard is yellow
Man on skateboard is wearing a white helmet
Black strap attached to white helmet
Red wheel on skateboard
Skateboard passing by orange cone
Skateboard passing by white cone

Objects:
shoe
elbow pad
cone
ground
shirt
boy
helmet
helmet
shirt
boy
skateboard
shirt
boy
skateboard
skateboard
helmet
skateboard race
wheel
wheel
wheel
wheel
foot
foot
arm
head
head
wheel
spectator
spectator
pole
curb
cone
street
shoe
strap
cone

Attributes:
name: shoe
attrs: white
green
blue
tennis
name: elbow pad
attrs: black
name: cone
attrs: orange
white
plastic
slalom
name: ground
name: shirt
attrs: white
blue
name: boy
attrs: waiting
sitting down
name: helmet
attrs: white
blue
skateboard
protective
black
name: skateboard
attrs: leaning
name: skateboard race
name: wheel
attrs: red
yellow
purple
name: foot
name: arm
name: head
name: spectator
name: pole
attrs: utility
steel
name: curb
name: street
name: strap
attrs: black

Contrastive attributes:
attr1: black
attr2: white
nouns: helmet
attr1: blue
attr2: green
nouns: shoe
attr1: red
attr2: yellow
nouns: wheel