#delete blank lines, lines starting with numbers
#delete headerline (Timestamp)
#delete lines with null entries (7 tabs)

/^%/{d}
/^ *$/{d}
/^\t[1-9]\+$/{d}
/^[[:blank:]]Timestamp/{d}
/^\t\{7\}/{d}
#/^[[:alpha:]]\+/p

#A normal line stars with a time stamp and has seven tabs with entries
#in between
#If line starts with alphabets or has only two or more tabs 
#then it is a part of fragmented line. They should be joined
#to the previous normal line.

/^\t[0-9/:]\+/{h;n}
/^[[:alpha:]]\+/{H;n}
/^\t\t\+/{H;n}
g
s/\n/ /g
p
s/.*//;x
}