Fixing wikipedia parsing in tutorial

[gperonato]

validating XML, adapting to new table structure, and using the permanent link

[coveralls]

Pull Request Test Coverage Report for Build 502

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 85.955%

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Totals
Change from base Build 501:	0.0%
Covered Lines:	1836
Relevant Lines:	2136

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💛 - Coveralls

[akariv]

Thanks @gperonato !