query: Scifi short story with alien standing guard against vicious aliens (that turn out to be humans)
positive_passages.docid: 155254
positive_passages.text: Searching for a short story from the point of view of alien alone at an outpost
negative_passages.docid: 113926
negative_passages.text: Story about a space war, and a human prisoner of war captured by alien enemy
negative_passages.docid: 158922
negative_passages.text: Short story about an asteroid colony where the plumber is an unclean/outcast
negative_passages.docid: 38857
negative_passages.text: Story Identification: Human Resistance to Conquering Aliens
negative_passages.docid: 17389
negative_passages.text: Need help recalling name of sci-if story about earth evolving into electronic life forms
negative_passages.docid: 142054
negative_passages.text: Seeking title / author of a story about alien first contact with Earth
negative_passages.docid: 77061
negative_passages.text: Poem about a time traveller and an alien fighting as mercenaries with swords
negative_passages.docid: 99223
negative_passages.text: Short story in book collection about war machines and armies out of control
negative_passages.docid: 23806
negative_passages.text: Scifi short story with a star in a jar
negative_passages.docid: 150807
negative_passages.text: 40s/50s short story about a mutant family with psi powers
negative_passages.docid: 6348
negative_passages.text: Short sci fi story where a space craft is made of various creatures from all over universe
negative_passages.docid: 94172
negative_passages.text: Science Fiction story about humans escaping earth's destruction
negative_passages.docid: 111401
negative_passages.text: Short sci-fi story about Earth blockaded by other human colonies
negative_passages.docid: 37150
negative_passages.text: Sci-fi novella where colonists begin to de-evolve - Mankind has reached limits of its evolutionary cycle
negative_passages.docid: 131816
negative_passages.text: Identify sci-fi short story about last man and woman on earth
negative_passages.docid: 46635
negative_passages.text: Book series about aliens who put "caps" on people to control them
negative_passages.docid: 54867
negative_passages.text: Trying to find a book about kids with 'sunguns' revolting against alien overlords