With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Summertime (George Gershwin song) was composed for the opera Porgy and Bess.
text_B: Gabrovizza -LRB- Slovene  : Gabrovec -RRB- is a village in the Comune di Sgonico -LRB- Province of Trieste -RRB- in the Italian region Friuli-Venezia Giulia , located about 10 kilometres -LRB- 7 mi -RRB- northwest of Trieste , on the border with Slovenia .. Friuli-Venezia Giulia. Friuli-Venezia Giulia. Province of Trieste. Province of Trieste. Sgonico. Sgonico
not_related.