Q: Does "To the southwest, the principality of Halych had developed trade relations with its Polish, Hungarian and Lithuanian neighbours and emerged as the local successor to Kievan Rus'." provide a valid answer to "Which neighbors did Halych develop trade relations with?"?
OPTIONS:
- yes
- no
A: yes

Q: Does "His explanation was a combination of migration and descent with modification." provide a valid answer to "What was the combination of effects that Darwin considered the most important in determining the differences in species that evolved separately in similar environments?"?
OPTIONS:
- yes
- no
A: yes

Q: Does "It is thought that she was influenced by his poor health and possibly also by rumours about his associations with women such as d'Agoult and Sand." provide a valid answer to "What was a possible reason for Chopin's failed engagement to Maria Wodzinska?"?
OPTIONS:
- yes
- no
A: yes

Q: Does "And there are differences between sex and gender; self-identification may not be correlated with biology perfectly." provide a valid answer to "Researchers from which university challenged the theory of race being only a social construct?"?
OPTIONS:
- yes
- no
A:
no