Compare	File	Name	Label
	F2	d50	Is [NAME] a member of a trade / labour union or a similar employee association
	F2	industry	ISIC code, Rev. 4 - section-level
	F2	industry_prev	ISIC code for previous activity, Rev. 4 - section-level
	F2	industry_second	ISIC code for secondary activity, Rev. 4 - section-level