In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Q: The most heat-treatable alloys are decided but only?, Context: Conversely, most heat-treatable alloys are precipitation hardening alloys, which produce the opposite effects that steel does. When heated to form a solution and then cooled quickly, these alloys become much softer than normal, during the diffusionless transformation, and then harden as they age. The solutes in these alloys will precipitate over time, forming intermetallic phases, which are difficult to discern from the base metal. Unlike steel, in which the solid solution separates to form different crystal phases, precipitation hardening alloys separate to form different phases within the same crystal. These intermetallic alloys appear homogeneous in crystal structure, but tend to behave heterogeneous, becoming hard and somewhat brittle.

A: Conversely
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Q: What do the residents do after fall to stay active?, Context: The city is also the home of road bowling, which is played in the north-side and south-west suburbs. There are also boxing and martial arts clubs (including Brazilian jiu-jitsu, Karate, Muay Thai and Taekwondo) within the city. Cork Racing, a motorsport team based in Cork, has raced in the Irish Formula Ford Championship since 2005. Cork also hosts one of Ireland's most successful Australian Rules Football teams, the Leeside Lions, who have won the Australian Rules Football League of Ireland Premiership four times (in 2002, 2003, 2005 and 2007). There are also inline roller sports, such as hockey and figure skating, which transfer to the ice over the winter season.[citation needed]

A: hockey and figure skating
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Q: what sector is mentioned last?, Context: The economy is a mixture of village agriculture and handicrafts, an industrial sector based largely on petroleum, support services, and a government characterized by budget problems and overstaffing. Petroleum extraction has supplanted forestry as the mainstay of the economy. In 2008, oil sector accounted for 65% of the GDP, 85% of government revenue, and 92% of exports. The country also has large untapped mineral wealth.

A:
oil
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