Given two strings, find out if the second string is a substring of the first string. Output true or false.
String 1: The quick brown fox
String 2: brown
True
Complete the following task based on the instruction and optional input provided.### Instruction:
Given two strings, find out if the second string is a substring of the first string. Output true or false.

### Input:
String 1: The quick brown fox
String 2: brown

### Output:
True