Why didn't the Longbottoms go into hiding?

[nearlyheadlessryan]

No: HPFGUIDX 110566

I was reading OOP for the fifth time and as I got near the end of the 
book, right around Harry's attempt to go and rescue Sirius, and it 
hit me: After Proffessor Trelawny's prediction in the Hog's Head, why 
did only the Potter's go into hiding and not also the Longbottoms? At 
this point Dumbledore would have only been able to deduce that it was 
EITHER Harry or Neville and would not have known that it was 
definetly Harry. So I will ask it again: Why, then, didn't Frank and 
Alice Longbottom not go into hiding as well? Were they not warned for 
some reason as, clearly, the Potters were? Maybe then Frank and Alice 
wouldn't be veggies. Anyone that has any Ideas I would love to hear 
them. -Thanks in advance!!!
                                        =nearlyheadlessRyan=