Fix hyponym detector in Scispacy processor

[nikhilranjan7]

Describe the bug
Parent and child string is not stored correctly in processor ontology. Only relation phrase can be tested e.g., "such as"

To Reproduce
Steps to reproduce the behavior:
Run Scispacy processor for hyponym detection

Expected behavior
Example:

• Keystone plant species such as fig trees are good for the soil.
  Real parent = Keystone plant species
  Real child = fig trees
  Real Relation = such as

But the scispacy processor stores:
Real parent = Key
Real child = fi
Real relation = such as