Question: What are the structure with a height larger than 600 m ?
Answers:
answer_text: Burj Khalifa
answer_text: Petronius Platform
answer_text: Tokyo Skytree
answer_text: Shanghai Tower
answer_text: KVLY-TV mast
answer_text: KRDK-TV mast
answer_text: KXTV/KOVR tower
answer_text: KATV tower
answer_text: WECT tower
answer_text: Diversified Communications Tower
answer_text: Winnie Cumulus Broadcasting Tower
answer_text: Hoyt Radio Tower 
answer_text: Baldpate Platform
answer_text: Lotte World Tower
answer_text: One World Trade Center
answer_text: Tianjin CTF Finance Centre
answer_text: World Trade Center, Tower 1
answer_text: Taipei 101
answer_text: Merdeka 118
answer_text: Jeddah Tower
answer_text: Sky City
answer_text: Burj Al Alam