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[null,"Task","Start","Duration"]
[null,"Preparation","2017-06-30",90]
[null,"Design","2018-02-01",30]
[null,"Bidding","2018-03-01",30]
[null,"Building","2018-02-01",60]
[null,"Auditing","2018-03-01",300]
[null,"Implementation","2018-11-30",40]