There's no such thing as a smart city. A smart city is in general, I would say, a city that provides all the services and the quality its citizens need. The focus of cities is a bit differently nowadays. I mean what citizens need is not only a road or a building anymore. It's also about communication infrastructure. We want to be connected to the internet, have access to information, see information how we can go to our work as quickly as possible, information about healthcare, want to generate our energy locally. So the need of people is changing. So I think a smart city is basically the same city as we used to have only integrated with common locations, infrastructure still providing the quality of life people want. It's about sharing things. I mean, sharing information was the reason why 400 years ago Amsterdam became the richest city in the world. We were sharing information about cargo and trade and then able to start the first chocolate chains and the first newspaper. So it was basically open data as we would call it nowadays. So the principles of a smart city of Amsterdam has not been changed. But nowadays we implement fabric to the home broadband infrastructure. We provide people with online information on their devices about traffic. We make sure energy can be generated local with solar panels or you can put your vehicle to the grid and all these types of things. So the day and I have the city didn't really change but new infrastructures give off the opportunity to improve services and quality of life. The biggest challenge to develop a smart city is not to be in your room and get a whiteboard and draw on it and think of what a smart city should look like. Creating a smart city is about involving people, stakeholders, everybody in the city to develop the city and it's about transformation. And once you start to see the city as a city in transformation, transforming to new purposes and office building, going to living area or a living area for students is changing to a living area for elderly people or the other way around. So the real challenge is to continuously look at the city in transformation and not think you can make a plan for the next 20 years because I think that's well where it goes wrong for most cities to do that. When you look at the relationship between the public and the private sector and this, I think at the moment we see that you need leadership from the public sector but real innovation comes from the private sector. So the challenge is to get incentives in the right place so making sure you have incentives for people who are involved in a mobility business to reduce the amount of kilometers people travel to make sure you have incentives in the energy business of companies who sell less energy or renewable energy instead of more energy and energy made of calls. So private sector has a big role in this and I think the collaboration with the government is key to make sure incentives will be in the right place. Smart cities are not a local thing although the execution is local. There are lots of people in the whole world, public sector, private sector citizens who have the same issues and intelligence. I think that's why it's great to organize events around this team and it's also great that the Smart City event this year isn't only about presentations people telling us what's the right way to go showing the brilliant business case or their green field house with no strings attached. Smart City event 2014 will be about interaction learning from each other and making next steps together.