How to hoard food for an emergency<br>Make sure you have at least £ 300/$490/342 euro's (these are equivalent as of the seventh of may , 2011). Go to a shop that sells canned foods and drinks. Tinned and dried foods are best, as they last for a long time.
The currency conversions that were mentioned were relevant as of 3 years after May 7th, 2009.
The article states "seventh of may , 2011" (May 7th, 2011), and three years after May 7th, 2009 is May 7th, 2012 - therefore, my statement is definitely incorrect, especially when you consider how much conversion rates differ from day to day. I think the system struggled because it only estimates math within a margin of error rather than definitively calculating it. 
( z1 relevant :ARG1 ( z2 convert :ARG1 ( z3 currency ) :ARG1-of ( z4 mention ) ) :time ( z5 as-of :op ( z6 after :op ( z7 date-entity :day 7 :month 5 :year 2009 ) :quant ( z8 temporal-quantity :quant 3 :unit ( z9 year ) ) ) ) )