In column C I 'shadowed' the example. Array enter this formula in C11 and fill down. If you aren’t familiar with array-entered formulas array enter means the formula must be committed from edit mode by simultaneously pressing and holding down Ctrl and Shift while hitting Enter.
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=INDEX($A$2:$A$7,SMALL(IF(INDEX($B$2:$F$7,,MATCH(C$10,$B$1:$F$1,0))="Y",ROW($A$2:$A$7)-MIN(ROW($A$2:$A$7))+1),ROWS($11:11)))



A
B
C
D
E
F
1
GROUP A
1995
1996
1997
1998
1999
2
TEXT1
3
TEXT2
Y
Y
Y
4
TEXT3
Y
Y
5
TEXT4
Y
Y
6
TEXT5
Y
Y
7
TEXT6
Y
8
9
10
FIND
1998
1998
11
RETURN
TEXT4
TEXT4
12
RETURN
TEXT6
TEXT6