Assertion: spacecraft's component | /r/HasSubevent | human expedition
Facets:
value: to mars
type: TRANSITIVE-OBJECT
Source sentences:
text: Other components of the system included a permanent modular space station, reusable space tug and nuclear interplanetary ferry, leading to a human expedition to Mars as early as 1986, or as late as 2000, depending on the level of funding allocated.