From the City's Web site, the Elections Department has a list of ballot questions (they have statewide Question 1 wrong), saying:

Question 5 (Specific to Somerville)

Shall the City of Somerville be allowed to exempt from the provisions of proposition two and one-half, so-called, the amounts required to pay for the bond(s) issued in order to design, engineer, construct, and equip the new Somerville High School?

I can't tell if that's the entire thing we're voting on, or if there's more detail behind it.