query: Story: Earth has no space travel, but aliens only have gunpowder weapons and blimps?
positive_passages.docid: 28481
positive_passages.text: Short story, where FTL travel is very simple but humans never discovered it
negative_passages.docid: 98562
negative_passages.text: Story about spaceship and a tool
negative_passages.docid: 98407
negative_passages.text: Looking for a (short?) story about a cryo ship looking for habitable planets
negative_passages.docid: 31135
negative_passages.text: Movie with a returning probe/satellite, an alien infection, and a nuke at the end
negative_passages.docid: 109023
negative_passages.text: Story about two wizards from Earth's past who go on relativistic trips through space
negative_passages.docid: 126418
negative_passages.text: Story about encounter with hostile aliens
negative_passages.docid: 18199
negative_passages.text: Looking for sci-fi novel I read about humanity finding alien station on orbit of Earth
negative_passages.docid: 94172
negative_passages.text: Science Fiction story about humans escaping earth's destruction
negative_passages.docid: 99076
negative_passages.text: Short story (maybe two in the same collection) about Alien education versus Earth
negative_passages.docid: 6002
negative_passages.text: Story (series) identification: Mind controlling satellite, a return to Earth, and two warring alien species
negative_passages.docid: 142054
negative_passages.text: Seeking title / author of a story about alien first contact with Earth
negative_passages.docid: 131436
negative_passages.text: Story about tricking the earth empire into saving hopeless aliens
negative_passages.docid: 6599
negative_passages.text: Story about shapeshifting aliens trying to invade Earth, thwarted by biodiversity
negative_passages.docid: 46055
negative_passages.text: Short sci-fi story: aliens regret setting Earth's destruction in motion
negative_passages.docid: 145842
negative_passages.text: Mankind prepares for a war with aliens by warring among itself
negative_passages.docid: 44499
negative_passages.text: Story about astronauts who set off an alien warning beacon on the moon (or Mars?)
negative_passages.docid: 26391
negative_passages.text: SF Story about human adapting to alien environment