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["Transmission number","Days since last transmission","Km traveled Bird 1","Average Km per day Bird 1",null,"Transmission number","Days since last transmission","Km traveled Bird 2","Average Km per day Bird 2"]
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[2,2,84,42,null,2]
[3,{"$nulls":4},3]
[4,{"$nulls":4},4]
[5,{"$nulls":4},5]
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[10,{"$nulls":4},10]
[11,{"$nulls":4},11]
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[16,{"$nulls":4},16]
[17,{"$nulls":4},17]
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