| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | pluto | astronomy enthusiasts | Pluto was reclassified as a dwarf planet in 2006, after once being considered the ninth planet, which is of interest to astronomy enthusiasts. | 9 |
| 2 | pluto | Roman Mythology Enthusiasts | Pluto, named after the Roman god of the underworld, is of interest to Roman Mythology enthusiasts. | 1 |
| 3 | pluto | school children | Pluto is commonly taught as the ninth planet in school curriculum and educational materials. | 1 |