| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | astronaut food | Space exploration in the United States | Astronaut food is specially designed for nutritional and practical needs in US space exploration. | 3 |
| 2 | astronaut training | Space exploration in the United States | Astronaut training in the United States requires extensive physical and psychological preparation. | 1 |
| 3 | spacecraft design | Space exploration in the United States | Spacecraft design in the United States prioritizes technological innovation and efficiency for space exploration. | 1 |