Table:
0
A
B
C
D
E
F
1
No. in series
Title
Directed by
Written by
Original air date
Production code
2
1
" The Gang Gets Racist "
John Fortenberry
Charlie Day & Rob McElhenney
August4,2005
IP01001
3
2
" Charlie Wants an Abortion "
John Fortenberry
Charlie Day & Rob McElhenney
August11,2005
IP01003
4
3
" Underage Drinking: A National Concern "
Dan Attias
Rob McElhenney
August18,2005
IP01006
5
4
" Charlie Has Cancer "
Rob McElhenney
Rob McElhenney
August25,2005
IP01004
6
5
" Gun Fever "
Dan Attias
Glenn Howerton
September1,2005
IP01005
7
6
" The Gang Finds a Dead Guy "
Dan Attias
Rob McElhenney
September8,2005
IP01007

Questions and formulas:
Question: Who directed the episode with production code ip01003? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,F1="IP01003"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,F2:F7="IP01003"),3))
Level: medium