In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.
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Question: Question: Which of the decidousous plants that border Igelbäcken is the most abundant in the world?  Passage:The upper part of the watershed is constituted of Norra Järvafältet, an open-air area characterized by moraine ridges covered with forests separated by water meadows and tilled fields. While some 20 hectares of the surrounding area is used for pasture, the stream is bordered by deciduous plants such as Alder and Birch and Bulrush can be found in non-shadowed patches. Some 2,5 kilometres from its origin, the stream passes down in a culvert under a traffic route (Akallavägen) and the Barkarby Airport before merging with the stream Djupanbäcken. This part of the catchment area contains a motocross track, a golf driving range, a closed dump, and receives stormwater from the E18 traffic route. Thereafter, the stream flows some 4 km in the valley separating the suburbs Akalla-Hjulsta and Tensta-Rinkeby and where are several rural structures including an ecological farm (Hästa Gård), eight allotment-gardens, and some minor overgrown wetlands. East of the valley the river is crossed by a second traffic route (Kymlingelänken) before flowing 2,5 km through an open grassland to reach a railway and the E4 traffic route, water from the latter treated in a local cleaning plant. The last 1.4 km passes more allotment-gardens and the gardens of the Ulriksdal Palace before jumping into Edsviken through a low dam.


Answer: While some 20 hectares of the surrounding area is used for pasture, the stream is bordered by deciduous plants such as Alder and Birch and Bulrush can be found in non-shadowed patches


Question: Question: How old was John Houseman when The Paper Chase was released? Passage:In an early example of guerrilla filmmaking, Frankenheimer photographed Martin Balsam being ferried out to the supercarrier USS Kitty Hawk, berthed at Naval Air Station North Island in San Diego (standing in for Gibraltar), without prior Defense Department permission. Frankenheimer needed a commanding figure to play Vice Admiral Farley C. Barnswell and asked his friend, well-known producer John Houseman to play him, to which he agreed, on condition that he have a fine bottle of wine (which is seen during the telephone scene), although he was uncredited for it. It was Houseman's American acting debut, and he would not appear onscreen again until his Oscar-winning role in The Paper Chase (1973). Frankenheimer also wanted a shot of Kirk Douglas entering the Pentagon, but could not get permission because of security considerations, so he rigged a movie camera in a parked station wagon to photograph Douglas walking up to the Pentagon. Douglas actually received salutes from military personnel inasmuch as he was wearing the uniform of a U.S. Marine Corps colonel. Several scenes, including one with nuns in the background, were shot inside Washington Dulles International Airport which had recently been built, and the production team were the first ever to film there. The alley and car park scene was shot in Hollywood, and other footage was shot in the Californian desert in 110 degree heat. The secret base and airstrip was specially built in the desert near Indio, California, and they borrowed an aircraft tail in one shot to make it look like a whole plane was off the picture. Originally the script had Lancaster die in a car crash at the end after hitting a bus, but finally this was edited out in favor of a small scene of him departing by taxi which was shot on a Sunday in Paris during production of The Train (1964).


Answer: It was Houseman's American acting debut, and he would not appear onscreen again until his Oscar-winning role in The Paper Chase (1973)


Question: Question: How many championships had Biela won? Passage:Yvan Muller started his BTCC career in 1998 replacing Audi Vice Champion Frank Biela that in the while came back in STW. Muller thanks to his major experience with front wheel Audi A4 got three podium and finished 7th in the 1998 championship while his teammate John Bintcliffe finished just 15th. After Audi withdraw at the end of 1998 BTCC, Yvan moved to the Vauxhall Motorsport team run by Triple Eight Race Engineering for 1999 alongside John Cleland using the Vauxhall Vectra. He would win his first BTCC race at round 7 Brands Hatch, he would eventually finish 6th in the championship while teammate John Cleland finished 13th. 2000 was the last year for the Super Tourers in the BTCC. Muller drove for Vauxhall again while Jason Plato and Vincent Radermecker joined after leaving Renault and Volvo who pulled out at the end of 1999. The Frenchman finished as the top driver for Vauxhall in 4th in the championship behind all three Ford drivers (Alain Menu, Anthony Reid and Rickard Rydell).


Answer:
Yvan Muller started his BTCC career in 1998 replacing Audi Vice Champion Frank Biela that in the while came back in STW