[Instruct]
Read the sentences of the two events and judge the relationship between 'Event_1 Self_motion' and 'Event_2 Expedition'.
'Event_1: Self_motion','Trigger: Expedition': The Expedition of the Thousand (Italian 'Spedizione dei Mille') is an event of the Italian Revival that took place in 1860.
'Event_2 Expedition','Trigger: lands': Volunteer Corps led by NAME_1 departs from Quarto dei Mille near Genoa and lands at Marsala, Sicily, the purpose of which was to conquer the Kingdom of the Two Sicilies ruled by it, the Bourbon dynasty - the Two Sicilies.
[Question] 
Choose what you think is the correct relationship from:
(a) Event1 is subevent of Event2 
(b) No relation
[Analysis]
1. Summarize:Event 1 was a spontaneous event that occurred during the Italian Renaissance in 1860, which was a maritime adventure led by NAME_1's volunteer army. Event 2 is the action event that occurs when the Volunteer Legion lands in Marsala, Sicily, in order to conquer the Kingdom of Two Sicilies ruled by the Bourbons - Two Sicilies. 
2. Think:Event1 is part of Event2. Event1 contained by Event2 in time and space. Event 1 (The Expedition of a Thousand) is a sub-event of Event 2 (Landing in Marsala, Sicily). The Crusade of the Thousand was part of, and spatially and temporally contained in, the larger event that landed at Marsala, Sicily. 3. The conclusion is that 'Event1 is a sub-event of Event2', and it is reasonable to re-examine the conclusion that the time and space of Event1 is included by Event2. 
[A