[2] quién es el obrero en, who is the workingman in.
[3] estado social, social condition. VARIANT: Situación en la sociedad.
[4] El que quiera, He who wishes. Note the use of the definite article instead of a personal pronoun.
[5] según se vaya, as we go.
[6] el indio. Collective nouns are very often expressed by the singular form preceded by the definite article.
[7] un solo indígena, a single Indian. Note the distinction in meaning from un indígena solo, an Indian alone.
[8] El obrero que Ud. ve, The laborer whom you see.
[9] a quien, to whom. VARIANT: Al cual.
[10] el blanco. Compare with 6.
[11] el cual, who.