I keep getting an error for my a$\_$cond that I can't seem to resolve, would appreciate if you could check it over and see what may be wrong. Thanks

ENTITY Lab$3$ IS

PORT $($w$,$x$,$y$,$z : IN STD$\_$LOGIC;

a$,$b$,$c$,$d$,$e$,$f$,$g : OUT STD$\_$LOGIC;

a$\_$cond, b$\_$cond, c$\_$cond, d$\_$cond, e$\_$cond, f$\_$cond, g$\_$cond : OUT STD$\_$LOGIC$)$;

END Lab$3$;

Architecture model OF Lab$3$ IS

Begin

a $<=(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND $($NOT X$)$ AND Y AND $($NOT Z$))$ OR $($W AND $($NOT X$)$ AND Y AND Z$)$ OR $($W AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $($W AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND X AND Y AND $($NOT Z$))$ OR $($W AND X AND Y AND Z$)$;

b$<=(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $($W AND $($NOT X$)$ AND Y AND $($NOT Z$))$ OR $($W AND $($NOT X$)$ AND Y AND Z$)$ OR $($W AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $($W AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND X AND Y AND $($NOT Z$))$ OR $($W AND X AND Y AND Z$)$;

c $<=(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND X AND Y AND $($NOT Z$))$ OR $($W AND $($NOT X$)$ AND Y AND $($NOT Z$))$ OR $($W AND $($NOT X$)$ AND Y AND Z$)$ OR $($W AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $($W AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND X AND Y AND $($NOT Z$))$ OR $($W AND X AND Y AND Z$)$;

d $<=(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND $($NOT X$)$ AND Y AND $($NOT Z$))$ OR $($W AND $($NOT X$)$ AND Y AND Z$)$ OR $($W AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $($W AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND X AND Y AND $($NOT Z$))$ OR $($W AND X AND Y AND Z$)$;

e$<=(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $($W AND $($NOT X$)$ AND Y AND $($NOT Z$))$ OR $($W AND $($NOT X$)$ AND Y AND Z$)$ OR $($W AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $($W AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND X AND Y AND $($NOT Z$))$ OR $($W AND X AND Y AND Z$)$;

f$<=(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND X AND Y AND $($NOT Z$))$ OR $($W AND $($NOT X$)$ AND Y AND $($NOT Z$))$ OR $($W AND $($NOT X$)$ AND Y AND Z$)$ OR $($W AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $($W AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND X AND Y AND $($NOT Z$))$ OR $($W AND X AND Y AND Z$)$;

g$<=(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND $($NOT Z$))$ OR $(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND $($NOT X$)$ AND Y AND Z$)$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $(($NOT W$)$ AND X AND Y AND Z$)$ OR $($W AND $($NOT X$)$ AND $($NOT Y$)$ AND $($NOT Z$))$ OR $($W AND $($NOT X$)$ AND Y AND $($NOT Z$))$ OR $($W AND $($NOT X$)$ AND Y AND Z$)$ OR $($W AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $($W AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND X AND Y AND $($NOT Z$))$ OR $($W AND X AND Y AND Z$)$

a$\_$cond $<=\text{'}1\text{'}$ WHEN

$"(($NOT W$)$ AND $($NOT X$)$ AND $($NOT Y$)$ AND Z$)$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $(($NOT W$)$ AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND $($NOT X$)$ AND Y AND $($NOT Z$))$ OR $($W AND $($NOT X$)$ AND Y AND Z$)$ OR $($W AND X AND $($NOT Y$)$ AND $($NOT Z$))$ OR $($W AND X AND $($NOT Y$)$ AND Z$)$ OR $($W AND X AND Y AND $($NOT Z$))$ OR $($W AND X AND Y AND Z$)"$

ELSE $\text{'}0\text{'}$;