Wtedy

Adverb

 pojawiła  się

Pronoun

  sprawa

Noun

  szkoły

Noun

  przy

Adposition

  torach

Noun

 kolejowych,  o

Adposition

  której

Determiner

  mało

Determiner

  osób

Noun

  wie

Verb

.

Then there was the case of the school by the railway tracks, which few people know about.

Then there was the case of the school by the railway tracks, which few people know about.