question: What activities are popular in the mountains of Tucson ?
answer: cycling , hiking , rock climbing , camping , birding , and wintertime snowboarding and skiing
turker_answer: The activities popular in the mountains of Tucson are cycling , hiking , rock climbing , camping , birding , and wintertime snowboarding and skiing .
rule-based: Popular in the mountains of Tucson are cycling , hiking , rock climbing , camping , birding , and wintertime snowboarding and skiing .