Sheet 1:
Value, Populate me
Value 1, blank_1
Value 2, blank_2
Sheet 2:
Populate X, Populate Y
Value 1, Y1
X2, Value 2
X3, Y3
How do I tell 'Sheet 1'!blank_1 to automatically equal "Populate X" from Sheet2 since it matches one of the values in "Populate X"'s column. Similarly, 'Sheet 1'!blank_2 should automatically equal "Populate Y".
Update:
I have created a public Google Spreadsheet to better illustrate the problem: https://docs.google.com/spreadsheet/ccc?key=0AhvDIvanE182dDFwU1VseHhaT2JIT0FoYXNQOVFwUWc&usp=sharing