Anchor: Amateur meteorologists, for example, make chitchat at two Usenet newsgroups devoted to general weather (sci.geo.meteorology and uk.sci.weather).
Entailed: There are online communities devoted to meteorology.
Contradiction: uk.sci.weather is mainly a place for programmers to chat.
Contradiction: There are no children around.
Contradiction: The children are on sand.
Contradiction: Some men are swimming in a cold pool.
Contradiction: People are indoors in a labratory.