What is {work period (end)} and {work period (start)} of {{Nastia Liukin} has {sport} as {female artistic gymnastics}}
Nastia Liukin performed in female artistic gymnastics from when and until when?
From when and until when did Nastia Liukin perform in female artistic gymnastics?
SELECT ?b ?d WHERE { ?w property:work_period_(start) ?d . ?w property:work_period_(end) ?b . resource:Nastia_Liukin property:sport ?w . ?w property:sport resource:female_artistic_gymnastics }
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