How can I make the core chart using the CSV Data including string and numerical value?

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Nov 25, 2015, 1:40:31 AM11/25/15
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Hello everyone. Please give me the any advices.

I wanna make a corechart using csv data including the string and numerical value.
I successed to execute the sample code made by google developers.

This sample code assumes that all columns in the CSV file are text columns.
My CSV file does not include only string value, but also numerical value, so
I have to modify the source code. However I cannot understand which lines I have to change.

I attached to my csv file.

Please help me ><
test.csv

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Nov 25, 2015, 3:22:08 AM11/25/15
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I can understand and modify the source code.

Thank you.

2015年11月25日水曜日 15時40分31秒 UTC+9 clock:
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