CONCEPTS: activity, asphyxiate, dioxide, lake, produce

GEN: volcanic activity under meromictic lake produced a cloud of carbon dioxide that asphyxiated villagers

CONCEPTS: attraction, overlook, village

GEN: shops and a pub with tourist attraction overlooking the village

CONCEPTS: campus, explore, student

GEN: students exploring college campus in the summer

CONCEPTS: dog, kennel, lock

GEN:
Two dogs are locked inside a kennel.