Query expansion - keywords (Ex#28, 29):
The results from Ex28# indicate that adding
global keywords is not beneficial w.r.t. the
overall FV quality score. The AFvS score is
high for both Ex#28 and Ex#29, which is also
the case for Ex#1a&b. Ex#29 indicates an
increase but compared to Ex#2 it is a decrease.
However, as discussed in Section 2 Step 3,
homogeneous FVs can be a feature that is
beneficial depending on the intended usage.