Hey, I know this isn't part of the course but would it be possible for someone to give me a hand with whats wrong with this code?

```
def Nth_Value(Nth_term, Nth_value):
n = Nth_value
equation = "Nth_term",Nth_term.subs({"n", n})
sequence_or_relation = input("Do you want the next Nth Values or the Relationship in the sequence?(Nth Value/ Relationship)"
if sequence_or_relation == "Nth value":
Un = input("What's the Nth Term?")
n_v =input("What's the Nth Value?")
Nth_Value(Un, n_v)
elif sequence_or_relation == Relationship:
break
```

Now i know there may be other issues with this but at the moment I'm kinda stuck with a error that I cannot for the life of me understand,

Error:

```
Traceback (most recent call last):
File "python", line 6
if sequence_or_relation == "Nth value":
^
SyntaxError: invalid syntax
```

I'm sorta new to this and this is like my first attempt alone so sorry if there's any glaring mistakes, I'm sorta just rolling with the errors