Anchor: It is supposed to bring more money into the system because returns on private securities are generally higher than returns on government bonds.
Entailed: It supposedly will bring more money into the system because returns in the private sector are higher than government bonds.  
Contradiction: Private securities have lower returns than government bonds.  
Contradiction: A girl is riding a bike on the patio.
Contradiction: Four people are playing instruments.
Contradiction: A single dog is swimming in a lake.
Contradiction: There are children in outdoor.