these are three people
this is the road
there are writings on the road
these are several bicycles
this is a staircase
this is some sand
a person walking beside the road
the writings are big
the hair is long
the t-shirt is plain
white heart on ground
shadow on the ground
lines in white tee shirt
white chalk on ground
black book bag on the ground
large black bike wheel
small white spot on the ground
person's feet on the ground
groove in girl's elbow
girls playing on the asphalt
people are sitting around drawing
I written in chalk
Heart written in chalk
Obama written in chalk
Boy sitting on the ground
Girl writing with chalk
Bike parked by a child
Bike parked on a road
Steps by a road
Two bikes by children
Girl with dark hair
girls drawing with chalk on sidewalk
heart shape drawn with chalk
bicycle on the steps
purse of the girl on sidewalk
concrete steps in an open area
bottom of legs of a pedestrian
front tire of a bike
word Obama written in chalk
ponytail of a young girl
word I written in chalk on ground

Objects:
there
this
these
this
person
road
hair
t-shirt
white
ground
shadow
ground
tee shirt
black
ground
black
small
spot
person's
groove
elbow
girl
written
obama
boy
chalk
road
bottom
ponytail

Attributes:
name: there
attrs: writings
sitting
people
name: this
attrs: sand
staircase
steps
big
road
name: these
attrs: bicycles
name: person
name: road
name: hair
attrs: long
name: t-shirt
attrs: plain
name: white
attrs: chalk
heart
name: ground
name: shadow
name: tee shirt
attrs: white
name: black
attrs: bike wheel
book bag
name: small
name: spot
name: person's
name: groove
name: elbow
name: girl
name: written
name: obama
name: boy
name: chalk
name: bottom
name: ponytail

Contrastive attributes: