Complex sentence: The recent example of Kazan Metro is the cause of optimism, when faced with the deadline for the city's millennia anniversary, Metro brigades from Russian and the CIS joined to help complete the system for the opening.
Split into simpler sentences: The recent example of the Kazan Metro is the cause of optimism. When faced with the deadline for the city's millennium anniversary, Metro brigades from Russia and the CIS joined to help complete the system for the opening.