history: I like to skateboard as hobby for fun.
knowledge: Skateboarding is an action sport which involves riding and performing tricks using a skateboard.
response: Oh really?  Do you perform tricks on your skateboard?
history: I like to skateboard as hobby for fun.
Oh really?  Do you perform tricks on your skateboard?
No I'm not that good yet!  I wonder how many skateboarders there are worldwide, do you know?
knowledge: A 2009 report found that the skateboarding market is worth an estimated $4.8 billion in annual revenue with 11.08 million active skateboarders in the world.
response: Yes!  I know about a 2009 report, that estimated over 11 million active skateboarders globally.
history: I like to skateboard as hobby for fun.
Oh really?  Do you perform tricks on your skateboard?
No I'm not that good yet!  I wonder how many skateboarders there are worldwide, do you know?
Yes!  I know about a 2009 report, that estimated over 11 million active skateboarders globally.
Wow that many!  Any idea what the skateboarding market is worth?
knowledge: A 2009 report found that the skateboarding market is worth an estimated $4.8 billion in annual revenue with 11.08 million active skateboarders in the world.
response: Yeah, it was worth about $4.8 billion in revenue annually, in that same 2009 report.
history: I like to skateboard as hobby for fun.
Oh really?  Do you perform tricks on your skateboard?
No I'm not that good yet!  I wonder how many skateboarders there are worldwide, do you know?
Yes!  I know about a 2009 report, that estimated over 11 million active skateboarders globally.
Wow that many!  Any idea what the skateboarding market is worth?
Yeah, it was worth about $4.8 billion in revenue annually, in that same 2009 report.
Wow really!  Hey I heard there's some controversy about skateboarding, damaging stuff, do you know about that?
knowledge: However, skateboarding has become controversial in areas in which the activity, although illegal, has damaged curbs, stoneworks, steps, benches, plazas and parks.
response: Those little wheels have caused damaged curbs, stoneworks, and steps.
history: I like to skateboard as hobby for fun.
Oh really?  Do you perform tricks on your skateboard?
No I'm not that good yet!  I wonder how many skateboarders there are worldwide, do you know?
Yes!  I know about a 2009 report, that estimated over 11 million active skateboarders globally.
Wow that many!  Any idea what the skateboarding market is worth?
Yeah, it was worth about $4.8 billion in revenue annually, in that same 2009 report.
Wow really!  Hey I heard there's some controversy about skateboarding, damaging stuff, do you know about that?
Those little wheels have caused damaged curbs, stoneworks, and steps.
Yeah I see people in our downtown area skating all over the historic places.  Sure they are doing some damage.
knowledge: However, skateboarding has become controversial in areas in which the activity, although illegal, has damaged curbs, stoneworks, steps, benches, plazas and parks.
response: Oh yes.  In some areas it's illegal to skateboard.  It can also damage benches, parks, and plazas.