One

Numeral

  afternoon

Noun

,  they

Pronoun

  passed

Verb

  by

Adposition

  the

Determiner

  encampment

Noun

  of

Adposition

  one

Numeral

  of

Adposition

  the

Determiner

  tribes

Noun

.

One afternoon, they passed by the encampment of one of the tribes.

One afternoon, they passed by the encampment of one of the tribes.